Stock-Based Compensation (Tables)

9 Months Ended

Sep. 30, 2019

Stock-Based Compensation

Schedule of stock based compensation expense categories in statement of operations

The Company recorded stock‑based compensation expense in the following expense categories of its accompanying consolidated statements of operations (in thousands):

	Three months ended				Nine months ended
	September 30, 2019				September 30, 2019
	2019		2018		2019		2018
Sales and marketing	$	31	$	21	$	61	$	51
General and administrative		29		32		101		90
Research and development		4		8		21		28
Total stock‑based compensation	$	64	$	61	$	183	$	169

Schedule of stock option activity

				Weighted
				average
		Weighted		remaining
	Number of	average exercise		contractual term
	shares	price per share		(years)
Outstanding at January 1, 2019	489,222	$	5.84
Granted	86,485		7.54
Exercised	(1,892)		5.93
Early exercised	(471)		5.93
Canceled/forfeited	(21,614)		6.98
Outstanding at September 30, 2019	551,730		6.07	7.29
Vested and expected to vest at September 30, 2019	551,730	$	6.07	7.29
Exercisable at September 30, 2019	461,414	$	5.47	5.63

Schedule of activity relating to early exercise of stock options

	Number of
	shares
Unvested balance at January 1, 2019	912
Early exercised	471
Vested	(508)
Unvested balance at September 30, 2019	875

Schedule of weighted average assumptions

	Nine months ended
	September 30, 2019
Expected dividend yield	—
Expected volatility	55.95	%
Risk‑free interest rate	2.12	%
Expected term	6.25	Years