Statement of Stockholders' Equity (USD $) In Thousands, except Share data	Total USD ($)	Common Stock [Member] USD ($)	Additional Paid-in Capital [Member] USD ($)	Retained Earnings [Member] USD ($)	Treasury Stock [Member] USD ($)	Accumulated Other Comprehensive Income (Loss) [Member] USD ($)	Restricted Stock [Member]
Stockholders' Equity, Balance at beginning of period at Dec. 31, 2009	$ 42,880	$ 49	$ 189,656	$ (146,164)	$ (661)	$ 0
Common Stock, Shares, Balance at beginning of period (in shares) at Dec. 31, 2009		49,152,000
Exercised		676,000
Exercise of common stock options	2,243	1	2,242
Employee stock purhcase plan (in shares)		293,000
Employee stock puchase plan	1,117		1,117
Sale of Common Stock (in shares)		3,171,000
Sale of Common Stock	(14,990)	(3)	(14,987)
Issuance of Common Stock for acquisition (in shares)		3,199,000
Shares issued for acquisition	19,388	3	19,385
Amortization of stock compensation stock	2,215		2,215
Grant of restricted stock (in shares)		405,000
Grant of restricted stock	1	1
Amortization expense of restricted stock	422		422
Amortization expense of non-employee stock options	(7)		(7)
Net income (loss)	10,653
Other comprehensive income (loss) (Foreign currency transaction)	0
Comprehensive loss	10,653
Stockholders' Equity, Balance at end of period at Dec. 31, 2010	93,902	57	230,017	(135,510)	(661)	0
Common Stock, Shares, Balance at ending of period (in shares) at Dec. 31, 2010		56,896,000
Exercised		1,394,000
Exercise of common stock options	5,324	2	5,322
Employee stock purhcase plan (in shares)		287,000
Employee stock puchase plan	1,965		1,965
Shares issued for acquisition	0
Amortization of stock compensation stock	2,851		2,851
Amortization expense of restricted stock	877		877
Amortization expense of non-employee stock options	409		409
Net income (loss)	(28,730)			(28,730)
Other comprehensive income (loss) (Foreign currency transaction)	(30)			0		(30)
Comprehensive loss	(28,760)
Stockholders' Equity, Balance at end of period at Dec. 31, 2011	76,569	59	241,441	(164,240)	(661)	(30)
Common Stock, Shares, Balance at ending of period (in shares) at Dec. 31, 2011	58,082,784	58,577,000
Exercised		1,168,000
Exercise of common stock options	4,992	1	4,991
Employee stock purhcase plan (in shares)		224,000
Employee stock puchase plan	2,369		2,369
Sale of Common Stock (in shares)		3,105,000
Sale of Common Stock	(40,069)	(3)	(40,066)
Shares issued for acquisition	0
Amortization of stock compensation stock	3,649		3,649
Grant of restricted stock (in shares)		13,000
Grant of restricted stock	0	0
Cancellation of restricted stock							(18,000)
Amortization expense of restricted stock	1,906		1,906
Amortization expense of non-employee stock options	916		916
Net income (loss)	(35,774)			(35,774)
Other comprehensive income (loss) (Foreign currency transaction)	(222)					(222)
Comprehensive loss	(35,996)
Stockholders' Equity, Balance at end of period at Dec. 31, 2012	$ 94,474	$ 63	$ 295,338	$ (200,014)	$ (661)	$ (252)
Common Stock, Shares, Balance at ending of period (in shares) at Dec. 31, 2012	62,573,763	63,069,000