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NASDAQ: CHKOTCPK: CHKAQ
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FormDescriptionDateFormat
8-KReport of unscheduled material events or corporate eventDec 29, 2006Open 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.
8-KReport of unscheduled material events or corporate eventDec 20, 2006Open 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.
8-KReport of unscheduled material events or corporate eventDec 19, 2006Open 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.
8-KReport of unscheduled material events or corporate eventDec 14, 2006Open 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.
8-KReport of unscheduled material events or corporate eventDec 11, 2006Open 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.
8-KReport of unscheduled material events or corporate eventDec 11, 2006Open 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.
424B2Form of prospectus filed in connection with primary offering of securities on a delayed basisDec 8, 2006Open Form of prospectus filed in connection with primary offering of securities on a delayed basis in HTML.Open Form of prospectus filed in connection with primary offering of securities on a delayed basis in DOC file.Open Form of prospectus filed in connection with primary offering of securities on a delayed basis in PDF file.Open Form of prospectus filed in connection with primary offering of securities on a delayed basis in XLS file.
424B5Form of prospectus disclosing information facts events covered in both forms 424B2 424B3Dec 7, 2006Open Form of prospectus disclosing information facts events covered in both forms 424B2 424B3 in HTML.Open Form of prospectus disclosing information facts events covered in both forms 424B2 424B3 in DOC file.Open Form of prospectus disclosing information facts events covered in both forms 424B2 424B3 in PDF file.Open Form of prospectus disclosing information facts events covered in both forms 424B2 424B3 in XLS file.
8-KReport of unscheduled material events or corporate eventDec 6, 2006Open 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.
FWPFree Writing ProspectusDec 1, 2006Open Free Writing Prospectus in HTML.Open Free Writing Prospectus in DOC file.Open Free Writing Prospectus in PDF file.Open Free Writing Prospectus in XLS file.
FWPFree Writing ProspectusDec 1, 2006Open Free Writing Prospectus in HTML.Open Free Writing Prospectus in DOC file.Open Free Writing Prospectus in PDF file.Open Free Writing Prospectus in XLS file.
424B2Form of prospectus filed in connection with primary offering of securities on a delayed basisDec 1, 2006Open Form of prospectus filed in connection with primary offering of securities on a delayed basis in HTML.Open Form of prospectus filed in connection with primary offering of securities on a delayed basis in DOC file.Open Form of prospectus filed in connection with primary offering of securities on a delayed basis in PDF file.Open Form of prospectus filed in connection with primary offering of securities on a delayed basis in XLS file.
S-3ASRAutomatic shelf registration statement of securities of well-known seasoned issuersNov 30, 2006Open Automatic shelf registration statement of securities of well-known seasoned issuers in HTML.Open Automatic shelf registration statement of securities of well-known seasoned issuers in DOC file.Open Automatic shelf registration statement of securities of well-known seasoned issuers in PDF file.Open Automatic shelf registration statement of securities of well-known seasoned issuers in XLS file.
8-KReport of unscheduled material events or corporate eventNov 29, 2006Open 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.
8-KReport of unscheduled material events or corporate eventNov 28, 2006Open 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.
S-3ASRAutomatic shelf registration statement of securities of well-known seasoned issuersNov 27, 2006Open Automatic shelf registration statement of securities of well-known seasoned issuers in HTML.Open Automatic shelf registration statement of securities of well-known seasoned issuers in DOC file.Open Automatic shelf registration statement of securities of well-known seasoned issuers in PDF file.Open Automatic shelf registration statement of securities of well-known seasoned issuers in XLS file.
424B3Form of prospectus reflecting facts events constituting substantive change from last formNov 27, 2006Open Form of prospectus reflecting facts events constituting substantive change from last form in HTML.Open Form of prospectus reflecting facts events constituting substantive change from last form in DOC file.Open Form of prospectus reflecting facts events constituting substantive change from last form in PDF file.Open Form of prospectus reflecting facts events constituting substantive change from last form in XLS file.
FWPFree Writing ProspectusNov 27, 2006Open Free Writing Prospectus in HTML.Open Free Writing Prospectus in DOC file.Open Free Writing Prospectus in PDF file.Open Free Writing Prospectus in XLS file.
4Statement of changes in beneficial ownership of securitiesNov 21, 2006Open 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 eventNov 21, 2006Open 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 securitiesNov 20, 2006Open 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 eventNov 20, 2006Open 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 securitiesNov 20, 2006Open 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 securitiesNov 17, 2006Open 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 securitiesNov 17, 2006Open 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.
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