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NASDAQ: CHKOTCPK: CHKAQ
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FormDescriptionDateFormat
EFFECTNotice from the SEC of registration effectivenessJun 25, 2021Open Notice from the SEC of registration effectiveness in HTML.Open Notice from the SEC of registration effectiveness in DOC file.Open Notice from the SEC of registration effectiveness in PDF file.Open Notice from the SEC of registration effectiveness in XLS file.
CORRESPCorrespondence from the Filer to the SECJun 23, 2021Open Correspondence from the Filer to the SEC in HTML.Open Correspondence from the Filer to the SEC in DOC file.Open Correspondence from the Filer to the SEC in PDF file.Open Correspondence from the Filer to the SEC in XLS file.
S-3/APre-effective amendment to an S-3 filingJun 23, 2021Open Pre-effective amendment to an S-3 filing in HTML.Open Pre-effective amendment to an S-3 filing in DOC file.Open Pre-effective amendment to an S-3 filing in PDF file.Open Pre-effective amendment to an S-3 filing in XLS file.
8-KReport of unscheduled material events or corporate eventJun 14, 2021Open Report of unscheduled material events or corporate event in HTML.Open Report of unscheduled material events or corporate event in DOC file.Open Report of unscheduled material events or corporate event in PDF file.Open Report of unscheduled material events or corporate event in XLS file.Open Report of unscheduled material events or corporate event in XBLR Viewer.Open Report of unscheduled material events or corporate event in XBLR file.
8-KReport of unscheduled material events or corporate eventJun 11, 2021Open Report of unscheduled material events or corporate event in HTML.Open Report of unscheduled material events or corporate event in DOC file.Open Report of unscheduled material events or corporate event in PDF file.Open Report of unscheduled material events or corporate event in XLS file.Open Report of unscheduled material events or corporate event in XBLR Viewer.Open Report of unscheduled material events or corporate event in XBLR file.
UPLOADCorrespondence from the SEC to the FilerMay 24, 2021Open Correspondence from the SEC to the Filer in HTML.Open Correspondence from the SEC to the Filer in DOC file.Open Correspondence from the SEC to the Filer in PDF file.Open Correspondence from the SEC to the Filer in XLS file.
S-3Simplified registration formMay 17, 2021Open Simplified registration form in HTML.Open Simplified registration form in DOC file.Open Simplified registration form in PDF file.Open Simplified registration form in XLS file.
8-KReport of unscheduled material events or corporate eventMay 17, 2021Open Report of unscheduled material events or corporate event in HTML.Open Report of unscheduled material events or corporate event in DOC file.Open Report of unscheduled material events or corporate event in PDF file.Open Report of unscheduled material events or corporate event in XLS file.Open Report of unscheduled material events or corporate event in XBLR Viewer.Open Report of unscheduled material events or corporate event in XBLR file.
10-QQuarterly report which provides a continuing view of a company's financial positionMay 13, 2021Open Quarterly report which provides a continuing view of a company's financial position in HTML.Open Quarterly report which provides a continuing view of a company's financial position in DOC file.Open Quarterly report which provides a continuing view of a company's financial position in PDF file.Open Quarterly report which provides a continuing view of a company's financial position in XLS file.Open Quarterly report which provides a continuing view of a company's financial position in XBLR Viewer.Open Quarterly report which provides a continuing view of a company's financial position in XBLR file.
8-KReport of unscheduled material events or corporate eventMay 11, 2021Open Report of unscheduled material events or corporate event in HTML.Open Report of unscheduled material events or corporate event in DOC file.Open Report of unscheduled material events or corporate event in PDF file.Open Report of unscheduled material events or corporate event in XLS file.Open Report of unscheduled material events or corporate event in XBLR Viewer.Open Report of unscheduled material events or corporate event in XBLR file.
4Statement of changes in beneficial ownership of securitiesMay 4, 2021Open Statement of changes in beneficial ownership of securities in HTML.Open Statement of changes in beneficial ownership of securities in DOC file.Open Statement of changes in beneficial ownership of securities in PDF file.Open Statement of changes in beneficial ownership of securities in XLS file.
10-K/AAmendment to a previously filed 10-KApr 30, 2021Open Amendment to a previously filed 10-K in HTML.Open Amendment to a previously filed 10-K in DOC file.Open Amendment to a previously filed 10-K in PDF file.Open Amendment to a previously filed 10-K in XLS file.Open Amendment to a previously filed 10-K in XBLR Viewer.Open Amendment to a previously filed 10-K in XBLR file.
8-KReport of unscheduled material events or corporate eventApr 27, 2021Open Report of unscheduled material events or corporate event in HTML.Open Report of unscheduled material events or corporate event in DOC file.Open Report of unscheduled material events or corporate event in PDF file.Open Report of unscheduled material events or corporate event in XLS file.Open Report of unscheduled material events or corporate event in XBLR Viewer.Open Report of unscheduled material events or corporate event in XBLR file.
15-12GCertification of termination of registration of a class of security under Section 12(g) or notice of suspension of duty to file reports under Section 13 and 15(d) of the Act Section 12 (g).Apr 23, 2021Open Certification of termination of registration of a class of security under Section 12(g) or notice of suspension of duty to file reports under Section 13 and 15(d) of the Act Section 12 (g). in HTML.Open Certification of termination of registration of a class of security under Section 12(g) or notice of suspension of duty to file reports under Section 13 and 15(d) of the Act Section 12 (g). in DOC file.Open Certification of termination of registration of a class of security under Section 12(g) or notice of suspension of duty to file reports under Section 13 and 15(d) of the Act Section 12 (g). in PDF file.Open Certification of termination of registration of a class of security under Section 12(g) or notice of suspension of duty to file reports under Section 13 and 15(d) of the Act Section 12 (g). in XLS file.
SC 13GSchedule filed to report acquisition of beneficial ownership of 5% or more of a class of equity securities by passive investors and certain institutionsMar 10, 2021Open Schedule filed to report acquisition of beneficial ownership of 5% or more of a class of equity securities by passive investors and certain institutions in HTML.Open Schedule filed to report acquisition of beneficial ownership of 5% or more of a class of equity securities by passive investors and certain institutions in DOC file.Open Schedule filed to report acquisition of beneficial ownership of 5% or more of a class of equity securities by passive investors and certain institutions in PDF file.Open Schedule filed to report acquisition of beneficial ownership of 5% or more of a class of equity securities by passive investors and certain institutions in XLS file.
SC 13GSchedule filed to report acquisition of beneficial ownership of 5% or more of a class of equity securities by passive investors and certain institutionsMar 10, 2021Open Schedule filed to report acquisition of beneficial ownership of 5% or more of a class of equity securities by passive investors and certain institutions in HTML.Open Schedule filed to report acquisition of beneficial ownership of 5% or more of a class of equity securities by passive investors and certain institutions in DOC file.Open Schedule filed to report acquisition of beneficial ownership of 5% or more of a class of equity securities by passive investors and certain institutions in PDF file.Open Schedule filed to report acquisition of beneficial ownership of 5% or more of a class of equity securities by passive investors and certain institutions in XLS file.
SC 13GSchedule filed to report acquisition of beneficial ownership of 5% or more of a class of equity securities by passive investors and certain institutionsMar 10, 2021Open Schedule filed to report acquisition of beneficial ownership of 5% or more of a class of equity securities by passive investors and certain institutions in HTML.Open Schedule filed to report acquisition of beneficial ownership of 5% or more of a class of equity securities by passive investors and certain institutions in DOC file.Open Schedule filed to report acquisition of beneficial ownership of 5% or more of a class of equity securities by passive investors and certain institutions in PDF file.Open Schedule filed to report acquisition of beneficial ownership of 5% or more of a class of equity securities by passive investors and certain institutions in XLS file.
10-KAnnual report which provides a comprehensive overview of the company for the past yearMar 1, 2021Open Annual report which provides a comprehensive overview of the company for the past year in HTML.Open Annual report which provides a comprehensive overview of the company for the past year in DOC file.Open Annual report which provides a comprehensive overview of the company for the past year in PDF file.Open Annual report which provides a comprehensive overview of the company for the past year in XLS file.Open Annual report which provides a comprehensive overview of the company for the past year in XBLR Viewer.Open Annual report which provides a comprehensive overview of the company for the past year in XBLR file.
4Statement of changes in beneficial ownership of securitiesFeb 23, 2021Open Statement of changes in beneficial ownership of securities in HTML.Open Statement of changes in beneficial ownership of securities in DOC file.Open Statement of changes in beneficial ownership of securities in PDF file.Open Statement of changes in beneficial ownership of securities in XLS file.
4Statement of changes in beneficial ownership of securitiesFeb 23, 2021Open Statement of changes in beneficial ownership of securities in HTML.Open Statement of changes in beneficial ownership of securities in DOC file.Open Statement of changes in beneficial ownership of securities in PDF file.Open Statement of changes in beneficial ownership of securities in XLS file.
4Statement of changes in beneficial ownership of securitiesFeb 23, 2021Open Statement of changes in beneficial ownership of securities in HTML.Open Statement of changes in beneficial ownership of securities in DOC file.Open Statement of changes in beneficial ownership of securities in PDF file.Open Statement of changes in beneficial ownership of securities in XLS file.
4Statement of changes in beneficial ownership of securitiesFeb 23, 2021Open Statement of changes in beneficial ownership of securities in HTML.Open Statement of changes in beneficial ownership of securities in DOC file.Open Statement of changes in beneficial ownership of securities in PDF file.Open Statement of changes in beneficial ownership of securities in XLS file.
4Statement of changes in beneficial ownership of securitiesFeb 23, 2021Open Statement of changes in beneficial ownership of securities in HTML.Open Statement of changes in beneficial ownership of securities in DOC file.Open Statement of changes in beneficial ownership of securities in PDF file.Open Statement of changes in beneficial ownership of securities in XLS file.
4Statement of changes in beneficial ownership of securitiesFeb 23, 2021Open Statement of changes in beneficial ownership of securities in HTML.Open Statement of changes in beneficial ownership of securities in DOC file.Open Statement of changes in beneficial ownership of securities in PDF file.Open Statement of changes in beneficial ownership of securities in XLS file.
S-8Securities offered to employees pursuant to employee benefit plansFeb 22, 2021Open Securities offered to employees pursuant to employee benefit plans in HTML.Open Securities offered to employees pursuant to employee benefit plans in DOC file.Open Securities offered to employees pursuant to employee benefit plans in PDF file.Open Securities offered to employees pursuant to employee benefit plans in XLS file.
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