Consolidated Statements of Shareholders' Equity (USD $) In Thousands, except Share data	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Retained Earnings [Member]	Total
Balances at December 31, 2009 at Dec. 31, 2009	$ 1	$ 71,373	$ 474	$ (60,343)	$ 11,505
Balances at December 31, 2009 (in Shares) at Dec. 31, 2009	21,250,000
Issuance of common stock under rights offering		1,421			1,421
Issuance of common stock		1,195			1,195
Issuance of common stock (in Shares)	948,000
Issuance of common stock under employee stock option purchase plan		15			15
Issuance of common stock under employee stock option purchase plan (in Shares)	20,000
Stock-based compensation		552			552
Stock options exercised		8			8
Stock options exercised (in Shares)	14,000				(13,750)
Warrants issued for financing		528			528
Warrants exercised		2			2
Warrants exercised (in Shares)	1,730,000
Foreign currency translation adjustment			(51)		(51)
Net loss				(8,517)	(8,517)
Balances at Dec. 31, 2010	1	75,094	423	(68,860)	6,658
Balances (in Shares) at Dec. 31, 2010	23,962,000
Issuance of common stock		463			463
Issuance of common stock (in Shares)	412,000
Issuance of common stock under employee stock option purchase plan		47			47
Issuance of common stock under employee stock option purchase plan (in Shares)	157,000
Stock-based compensation		319			319
Stock-based compensation (in Shares)	215,000
Stock options exercised (in Shares)	7,000				(7,500)
Warrants issued for financing		33			33
Warrants exercised		6			6
Warrants exercised (in Shares)	160,000
Foreign currency translation adjustment			(3)		(3)
Net loss				(6,055)	(6,055)
Balances at Dec. 31, 2011	1	75,962	420	(74,915)	1,468
Balances (in Shares) at Dec. 31, 2011	24,913,000				24,913,135
Issuance of common stock	3	4,798			4,801
Issuance of common stock (in Shares)	19,600,000
Issuance of common stock under employee stock option purchase plan		25			25
Issuance of common stock under employee stock option purchase plan (in Shares)	186,000
Stock-based compensation		200			200
Foreign currency translation adjustment			40		40
Net loss				(5,709)	(5,709)
Balances at Dec. 31, 2012	$ 4	$ 80,985	$ 460	$ (80,624)	$ 825
Balances (in Shares) at Dec. 31, 2012	44,699,000				44,698,650