Stock-Based Compensation (Tables)

9 Months Ended

Sep. 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	1,935,883		4.44
Vested	(1,224,471)		34.32
Forfeited	(676,723)		16.40
Outstanding at September 30, 2022	2,231,255	$	19.61

Schedule of weighted average assumptions for employee grants

	Nine Months Ended
Valuation assumptions:	September 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	(12,830)		4.96
Forfeited	(188,465)		44.18
Outstanding at September 30, 2022	1,402,931	$	28.21	3.8	$	260
Options vested and expected to vest at September 30, 2022	1,402,931	$	28.21	3.8	$	260
Exercisable at September 30, 2022	1,370,302	$	27.57	3.8	$	260

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

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2022		2021		2022		2021
Cost of revenue - product	$	331	$	256	$	778	$	852
Cost of revenue - service		793		883		2,264		2,631
Research and development		1,741		1,261		4,021		4,533
Sales and marketing		285		209		593		1,251
General and administrative		12,228		4,292		20,517		14,833
Discontinued operations		1,858		1,110		4,364		4,862
Total stock-based compensation expense	$	17,236	$	8,011	$	32,537	$	28,962