Stock-Based Compensation (Tables)

6 Months Ended

Jun. 30, 2022

Stock-Based Compensation

Summary of restricted stock award activity

		Weighted
		average
	Number	grant-date
	of shares	fair value
Outstanding at December 31, 2021	2,196,566	$	40.19
Granted	768,351		5.32
Vested	(456,774)		44.01
Forfeited	(169,424)		36.67
Outstanding at June 30, 2022	2,338,719	$	28.24

Schedule of weighted average assumptions for employee grants

	Six Months Ended
Valuation assumptions:	June 30, 2021
Expected volatility	58.57	%
Expected term (years)	5.48
Risk-free interest rate	0.50	%
Dividend yield	—

Summary of stock option activity

				Weighted
		Weighted		average
		average		remaining	Aggregate
	Number	exercise		contractual	intrinsic
	of shares	price		term	value
Outstanding at December 31, 2021	1,604,226	$	29.90
Exercised	(12,573)		5.01
Forfeited	(143,116)		46.27
Outstanding at June 30, 2022	1,448,537	$	28.49	4.9	$	-
Options vested and expected to vest at June 30, 2022	1,448,537	$	28.49	4.9	$	-
Exercisable at June 30, 2022	1,379,541	$	27.16	4.8	$	-

Schedule of recorded stock-based compensation expense related to stock options

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2022		2021		2022		2021
Cost of revenue - product	$	223	$	337	$	447	$	596
Cost of revenue - service		570		898		1,471		1,748
Research and development		761		2,069		2,280		3,272
Sales and marketing		50		345		308		1,042
General and administrative		3,488		6,178		8,289		10,541
Discontinued operations		1,600		2,522		2,506		3,752
Total stock-based compensation expense	$	6,692	$	12,349	$	15,301	$	20,951