Stockholders' Equity (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Balance			$ 5,318
Net proceeds from sale of common stock			1,927	$ 5,250
Stock-based compensation expense			121
Net loss	$ (753)	$ (866)	(2,976)	$ (3,589)	$ 4,341
Balance	$ 4,390		$ 4,390		$ 5,318
Common Stock [Member]
Balance, shares			5,344,372
Balance			$ 5
Net proceeds from sale of common stock, shares			500,000
Net proceeds from sale of common stock			$ 7,375
Stock-based compensation expense, shares
Stock-based compensation expense
Net loss
Balance, shares	5,844,372		5,844,372		5,344,372
Balance	$ 6		$ 6		$ 5
Additional Paid in Capital [Member]
Balance			33,099
Net proceeds from sale of common stock			1,926
Stock-based compensation expense			121
Net loss
Balance	35,146		35,146		33,099
Accumulated deficit [Member]
Balance			(27,786)
Net proceeds from sale of common stock
Stock-based compensation expense
Net loss			(2,976)
Balance	$ (30,762)		$ (30,762)		$ (27,786)