Stock Option Plan (Tables)

12 Months Ended

Dec. 31, 2016

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Schedule of summary of stock-based compensation activity

​	Options Outstanding
​	Number of  Stock Options  Outstanding		Weighted  Average  Exercise Price			Weighted  Average  Remaining  Contractual  Term (In Years)		Aggregate  Intrinsic Value  (in thousands)
Balance, January 1, 2015	​	649,500	​	$	1.49	​	7.44	​	$	474
Options granted	​	1,308,017	​	​	3.15	​		​
Options exercised	​	(7,051)	​	​	2.10	​	​	​	$	17
Options forfeited/cancelled	​	(40,555)	​	​	2.29	​		​
Balance, December 31, 2015	​	1,909,911	​	$	2.58	​	8.56	​	$	813
Options granted	​	160,000	​	​	2.23	​		​
Options forfeited/cancelled	​	(20,394)	​	​	2.23	​		​
Balance, December 31, 2016	​	2,049,517	​	$	2.58	​	7.66	​	$	306
Exercisable as of December 31, 2015	​	1,464,189	​	$	2.60	​	8.32	​	$	713
Exercisable as of December 31, 2016	​	1,643,417	​	$	2.60	​	7.66	​	$	306

Schedule of weighted-average Black-Scholes fair value assumptions

​	Year ended December 31,
​	2016	2015
Expected term (in years)	5  ​	5  ​
Risk-free interest rate	1.28%​	1.5 – 1.76%​
Expected volatility	99.9%​	80.7 – 83.3%​
Expected dividend rate	0%​	0%​

Schedule of stock-based compensation based on the role and responsibility of the recipient in the Company

​	Year ended December 31,
​	2016			2015
Cost of Revenue	​	$	2	​	$	2
Engineering and Product Development	​	​	47	​	​	101
Sales and Marketing	​	​	94	​	​	1,172
General and Administrative	​	​	157	​	​	1,330
Total	​	$	300	​	$	2,605