Consolidated Statement of Changes in Stockholders' Equity (USD $) In Thousands, except Share data, unless otherwise specified	Total	Common Stock	Additional Paid-In Capital	Accumulated Other Comprehensive Loss	Accumulated Deficit
Balance at Dec. 31, 2012	$ 163,781	$ 79	$ 213,823	$ (78)	$ (50,043)
Balance (in shares) at Dec. 31, 2012	79,182,913	79,182,913
Increase (Decrease) in Stockholders' Deficit
Issuance of common stock in connection with exercise of stock options	202		202
Issuance of common stock in connection with exercise of stock options (in shares)		216,034
Issuance of common stock in connection with vesting of restricted stock units, net of withholdings	(261)		(261)
Issuance of common stock in connection with vesting of restricted stock units, net of withholdings (in shares)		61,954
Stock-based compensation expense	1,657		1,657
Net loss	(3,753)				(3,753)
Foreign currency translation adjustments	(33)			(33)
Balance at Mar. 31, 2013	$ 161,593	$ 79	$ 215,421	$ (111)	$ (53,796)
Balance (in shares) at Mar. 31, 2013	79,460,901	79,460,901