Common Stock (Tables)

12 Months Ended

Dec. 31, 2012

Stockholders' Equity Note [Abstract]

Reserved shares of common stock

Reserved shares of common stock were as follows (in thousands):

	December 31,
	2012	2011
Warrants	17	17
Options	3,655	4,684
Restricted stock units	421	137
Total outstanding	4,093	4,838