Consolidated Statements of Stockholders' Equity (USD $) In Thousands, except Share data	Total	Common Stock	Additional Paid-in Capital	Accumulated Deficit
Balance at Dec. 31, 2010	$ 18,023	$ 238	$ 42,887	$ (25,102)
Balance (in shares) at Dec. 31, 2010		23,780,606
Repurchase of warrants	(90)	0	(90)	0
Issuance of common stock upon exercise of stock options (in shares)		2,500
Issuance of common stock upon exercise of stock options	3	0	3	0
Value of share-based arrangements (in shares)		0
Value of share-based arrangements	69	0	69	0
Net income	1,034	0	0	1,034
Balance at Dec. 31, 2011	19,039	238	42,869	(24,068)
Balance (in shares) at Dec. 31, 2011		23,783,106
Value of share-based arrangements (in shares)		0
Value of share-based arrangements	60	0	60	0
Issuance of common stock in connection with asset purchase (in shares)		160,305
Issuance of common stock in connection with asset purchase	600	1	599	0
Issuance of common stock upon exercise of stock options and warrants (in shares)		161,214
Issuance of common stock upon exercise of stock options and warrants	122	2	120	0
Issuance of common stock for services (in shares)		20,000
Issuance of common stock for services	74	0	74	0
Net income	12,801	0	0	12,801
Balance at Dec. 31, 2012	$ 32,696	$ 241	$ 43,722	$ (11,267)
Balance (in shares) at Dec. 31, 2012		24,124,625