Stock Options (Tables)

6 Months Ended

Jun. 30, 2018

Stock Options

Summary of the Company's stock option activity and related information

	Options			Weighted Average Exercise Price		Weighted average remaining contractual term (years)		Aggregate intrinsic value (in thousands)
Outstanding at December 31, 2017		2,071,616		$	1.47		5.9
Granted		355,056			12.40
Exercised		(206,404	)		1.80
Forfeited		(24,935	)		1.03
Outstanding at June 30, 2018		2,195,333			3.20		7.0	$	71,342
Exercisable at June 30, 2018		1,272,700			1.61		5.5		43,342

Schedule of stock compensation recognized, before taxes

	Three Months Ended June 30,				Six Months Ended June 30,
	2018		2017		2018		2017
General and administrative	$	238	$	24	$	266	$	48
Sales and marketing		26		21		47		43
Research and development		5		9		11		17
Total stock-based compensation	$	269	$	54	$	324	$	108

Summary of weighted average assumptions for fair value of options granted

	Six Months Ended June 30,
	2018	2017
Expected life (years)	5.50 - 6.25	5.75 - 6.25
Expected volatility	37.5 - 49.8%	40.6 - 41.5%
Risk-free interest rate	2.38 - 2.84%	1.88 - 2.32%
Dividend yield	0.0%	0.0%
Weighted average fair value	$6.10	$0.40