Condensed Consolidated Statement of Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Common Stock	Additional Paid-In Capital	Accumulated Deficit	Total
Beginning balance, amount at Dec. 31, 2016	$ 14	$ 58,716	$ (58,015)	$ 715
Beginning balance, shares at Dec. 31, 2016	13,578,556
Net loss		1,844	(929)	915
Ending balance, amount at Dec. 31, 2017	$ 14	60,560	(58,944)	1,630
Ending balance, shares at Dec. 31, 2017	14,287,556
Share-based compensation		62		62
Issuance of common stock for exercise of stock option, amount		2		2
Issuance of common stock for exercise of stock option, shares	1,100
Net loss			(63)	(63)
Ending balance, amount at Mar. 31, 2018	$ 14	$ 60,624	$ (59,007)	$ 1,631
Ending balance, shares at Mar. 31, 2018	14,288,656