Statements of Redeemable Convertible Preferred Stock and Stockholders' Equity (Deficit) - USD ($) $ in Thousands	Common Stock	Treasury stock	Additional Paid-in Capital	Accumulated deficit	Total
Balance at Jan. 01, 2015	$ 5		$ 17,298	$ (13,867)	$ 3,436
Balance (in shares) at Jan. 01, 2015	4,741,017	(25,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common Stock Private Placements			1,374		1,374
Common Stock Private Placements (in shares)	400,500
Stock Option Exercises			14		$ 14
Stock Option Exercises (in shares)	7,051				7,051
Stock-based Compensation			2,605		$ 2,605
Net loss				(8,501)	(8,501)
Balance at Dec. 31, 2015	$ 5		21,291	(22,368)	(1,072)
Balance (in shares) at Dec. 31, 2015	5,148,568	(25,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of Warrants			407		407
Stock-based Compensation			300		300
Net loss				(2,554)	(2,554)
Balance at Dec. 31, 2016	$ 5		$ 21,998	$ (24,922)	$ (2,919)
Balance (in shares) at Dec. 31, 2016	5,148,568	(25,000)