CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (DEFICIT) (USD $)	Total	Common Stock [Member]	Additional Paid in Capital [Member]	Accumulated Deficit [Member]	Accumulated Other Comprehensive Income (Loss) [Member]
Balance at Dec. 31, 2010	$ (14,976,000)	$ 764,000	$ 184,223,000	$ (200,208,000)	$ 245,000
Balance (in shares) at Dec. 31, 2010		76,427,561
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	13,743,000	0	0	13,743,000	0
Change in unrealized gain (loss) on fair value of investments	(76,000)	0	0	0	(76,000)
Foreign currency translation adjustment	(456,000)	0	0	0	(456,000)
Stock-based compensation	1,987,000	0	1,987,000	0	0
Shares issued for compensation	62,346,000	151,000	62,195,000	0	0
Shares issued for compensation (in shares)		15,075,502
Stock options exercised	83,000	4,000	79,000	0	0
Stock options exercised (in shares)		371,632
Restricted stock issued, net of cancellations	0	4,000	(4,000)	0	0
Restricted stock issued, net of cancellations (in shares)		386,362
Balance at Dec. 31, 2011	62,651,000	923,000	248,480,000	(186,465,000)	(287,000)
Balance (in shares) at Dec. 31, 2011		92,261,057
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(18,791,000)	0	0		0
Change in unrealized gain (loss) on fair value of investments	(25,000)	0	0	0	(25,000)
Foreign currency translation adjustment	343,000	0	0	0	343,000
Stock-based compensation	2,091,000	0	2,091,000	0	0
Stock options exercised	431,000	4,000	427,000	0	0
Stock options exercised (in shares)		390,957
Restricted stock issued, net of cancellations	0	0	0	0	0
Restricted stock issued, net of cancellations (in shares)		81,434
Balance at Dec. 31, 2012	46,700,000	927,000	250,998,000	(205,256,000)	31,000
Balance (in shares) at Dec. 31, 2012	92,906,049	92,733,448
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	38,647,000	0	0		0
Change in unrealized gain (loss) on fair value of investments	(79,000)	0	0	0	(79,000)
Foreign currency translation adjustment	(559,000)	0	0	0	(559,000)
Stock-based compensation	2,114,000	0	2,114,000	0	0
Stock options exercised	83,000	2,000	81,000	0	0
Stock options exercised (in shares)		129,686
Restricted stock issued, net of cancellations	0	0	0	0	0
Restricted stock issued, net of cancellations (in shares)		42,915
Balance at Dec. 31, 2013	$ 86,906,000	$ 929,000	$ 253,193,000	$ (166,609,000)	$ (607,000)
Balance (in shares) at Dec. 31, 2013	92,733,448	92,906,049