Stock Option Plan (Tables)

9 Months Ended

Sep. 30, 2018

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

Schedule of stock option 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, 2018		1,855,138		$	2.69		7.48	$	9,850
Options granted		135,000			8.00
Options exercised		(216,193	)		2.03
Options forfeited/canceled		(6,410	)		3.44
Balance, September 30, 2018		1,768,012		$	3.17		7.09	$	57,330
Exercisable as of September 30, 2018		1,452,400		$	2.83		6.81	$	47,589

Schedule of weighted-average Black-Scholes fair value assumptions

	Nine months ended September 30,
	2018			2017
Expected term (in years)		5			5
Risk-free interest rate		2.2	%		1.94 – 2.02	%
Expected volatility		99.0	%		104.0 – 106.2	%
Expected dividend rate		-	%		-	%

Schedule of stock-based compensation

	Three months ended September 30,				Nine months ended September 30
	2018		2017		2018		2017
Cost of Revenue	$	1	$	1	$	1	$	1
Engineering and Product Development		9		12		26		36
Sales and Marketing		23		24		74		70
General and Administrative		106		52		369		146
Total	$	139	$	89	$	470	$	253