Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]
Balance at Dec. 31, 2013	$ 28,086	$ 251	$ 44,944	$ (17,109)
Balance (in shares) at Dec. 31, 2013		25,070,386
Sale of common stock	15,616	$ 69	15,547	0
Sale of common stock (in shares)		6,900,000
Issuance of common stock upon exercise of stock options	309	$ 3	306	0
Issuance of common stock upon exercise of stock options (in shares)		341,890
Value of share-based arrangements	708	$ 0	708	0
Value of share-based arrangements (in shares)		0
Net income (loss)	(720)	$ 0	0	(720)
Balance at Dec. 31, 2014	43,999	$ 323	61,505	(17,829)
Balance (in shares) at Dec. 31, 2014		32,312,276
Issuance of common stock upon exercise of stock options and warrants	460	$ 5	455	0
Issuance of common stock upon exercise of stock options and warrants (in shares)		482,506
Issuance of common stock for services	30	$ 0	30	0
Issuance of common stock for services (in shares)		9,835
Value of share-based arrangements	173	$ 0	173	0
Value of share-based arrangements (in shares)		0
Net income (loss)	4,763	$ 0	0	4,763
Balance at Dec. 31, 2015	$ 49,425	$ 328	$ 62,163	$ (13,066)
Balance (in shares) at Dec. 31, 2015		32,804,617