$CHKR SEC Filings

Filing Filed On
AMENDMENT NO. 6 TO FORM S-1 09 Nov 2011
AMENDMENT NO. 5 TO FORM S-1 02 Nov 2011
AMENDMENT NO. 4 TO FORM S-1 31 Oct 2011
AMENDMENT NO.3 TO FORM S-1 18 Oct 2011
AMENDMENT NO. 2 TO FORM S-1 19 Sep 2011
AMENDMENT NO. 1 TO FORM S-1 19 Aug 2011