Consolidated Statement of Stockholders' Equity (Deficiency) (Parenthetical)	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2009
Common Stock [Member]
Number of shares delivered to pay exercise price	300,799	2,814,866
Additional Paid-in Capital [Member]
Number of shares delivered to pay exercise price	300,799	2,814,866