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NASDAQ: CHKOTCPK: CHKAQ
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FormDescriptionDateFormat
4Statement of changes in beneficial ownership of securitiesJun 17, 2013Open 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 securitiesJun 17, 2013Open 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 securitiesJun 17, 2013Open 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 securitiesJun 17, 2013Open 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 securitiesJun 17, 2013Open 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 securitiesJun 17, 2013Open 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 securitiesJun 17, 2013Open 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.
SC 13G/AAmendment to a previously filed SC 13GJun 11, 2013Open Amendment to a previously filed SC 13G in HTML.Open Amendment to a previously filed SC 13G in DOC file.Open Amendment to a previously filed SC 13G in PDF file.Open Amendment to a previously filed SC 13G in XLS file.
4Statement of changes in beneficial ownership of securitiesJun 11, 2013Open 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 securitiesJun 11, 2013Open 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.
DEFA14AAdditional proxy soliciting materials - definitiveJun 5, 2013Open Additional proxy soliciting materials - definitive in HTML.Open Additional proxy soliciting materials - definitive in DOC file.Open Additional proxy soliciting materials - definitive in PDF file.Open Additional proxy soliciting materials - definitive in XLS file.
8-KReport of unscheduled material events or corporate eventMay 23, 2013Open 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.
4Statement of changes in beneficial ownership of securitiesMay 22, 2013Open 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 securitiesMay 22, 2013Open 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 securitiesMay 21, 2013Open 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.
8-KReport of unscheduled material events or corporate eventMay 20, 2013Open 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.
25-NSENotification filed by national security exchange to report the removal from listing and registration of matured, redeemed or retired securitiesMay 13, 2013Open Notification filed by national security exchange to report the removal from listing and registration of matured, redeemed or retired securities in HTML.Open Notification filed by national security exchange to report the removal from listing and registration of matured, redeemed or retired securities in DOC file.Open Notification filed by national security exchange to report the removal from listing and registration of matured, redeemed or retired securities in PDF file.Open Notification filed by national security exchange to report the removal from listing and registration of matured, redeemed or retired securities in XLS file.
10-QQuarterly report which provides a continuing view of a company's financial positionMay 10, 2013Open 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 9, 2013Open 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.
ARSAn annual report to security holders.May 8, 2013Open An annual report to security holders. in HTML.Open An annual report to security holders. in DOC file.Open An annual report to security holders. in PDF file.Open An annual report to security holders. in XLS file.
3/AAmendment to a previously filed Form 3.May 8, 2013Open Amendment to a previously filed Form 3. in HTML.Open Amendment to a previously filed Form 3. in DOC file.Open Amendment to a previously filed Form 3. in PDF file.Open Amendment to a previously filed Form 3. in XLS file.
SC 13G/AAmendment to a previously filed SC 13GMay 8, 2013Open Amendment to a previously filed SC 13G in HTML.Open Amendment to a previously filed SC 13G in DOC file.Open Amendment to a previously filed SC 13G in PDF file.Open Amendment to a previously filed SC 13G in XLS file.
3Initial filing by director officer or owner of more than ten percent.May 8, 2013Open Initial filing by director officer or owner of more than ten percent. in HTML.Open Initial filing by director officer or owner of more than ten percent. in DOC file.Open Initial filing by director officer or owner of more than ten percent. in PDF file.Open Initial filing by director officer or owner of more than ten percent. in XLS file.
DEF 14AOfficial notification to shareholders of matters to be brought to a vote ("Proxy")May 3, 2013Open Official notification to shareholders of matters to be brought to a vote ("Proxy") in HTML.Open Official notification to shareholders of matters to be brought to a vote ("Proxy") in DOC file.Open Official notification to shareholders of matters to be brought to a vote ("Proxy") in PDF file.Open Official notification to shareholders of matters to be brought to a vote ("Proxy") in XLS file.
DEFA14AAdditional proxy soliciting materials - definitiveMay 3, 2013Open Additional proxy soliciting materials - definitive in HTML.Open Additional proxy soliciting materials - definitive in DOC file.Open Additional proxy soliciting materials - definitive in PDF file.Open Additional proxy soliciting materials - definitive in XLS file.
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