Stockholders' Equity And Stock-Based Compensation (Tables)

3 Months Ended

Mar. 31, 2022

Stockholders' Equity [Line Items]

Schedule Of Stock-Based Compensation Expense

	Three-Month Periods Ended
	March 31,
	2022		2021
Cost of revenues	$	90	$	—
Research and development		457		3,166
Sales and marketing		454		1,761
General and administrative		1,006		2,038
Total stock-based compensation expense	$	2,007	$	6,965

Summary Of Stock-Based Compensation Expense By Type

	Three-Month Periods Ended
	March 31,
	2022		2021
Time-based options	$	1,807	$	1,770
Performance options		84		5,141
ESPP		116		54
Total stock-based compensation expense	$	2,007	$	6,965

Stock Options [Member]

Stockholders' Equity [Line Items]

Summary Of Stock Option Activity

	Stock Options Outstanding
			Weighted
	Number		average
	of shares		exercise price
Balances — December 31, 2021	5,996,813	$	15.77
Options granted	381,300
Options exercised	-
Options canceled	(819,229)
Options expired	-
Balances — March 31, 2022	5,558,884	$	15.62
Exercisable — March 31, 2022	3,670,055	$	15.99

Schedule Of Fair Value Of Employee Stock Options

	Three-Month Periods Ended March 31,
	2022	2021
Expected term in years	6.3 - 6.8	6.1
Expected volatility	83%	78%
Risk-free interest rate	1.9%	1.0 - 1.1%
Dividend yield	—	—

Time-Based Options [Member]

Stockholders' Equity [Line Items]

Summary Of Stock Option Activity

	Stock Options Outstanding
			Weighted
	Number		average
	of shares		exercise price
Balances — December 31, 2021	4,796,716	$	16.44
Options granted	231,300
Options exercised	-
Options canceled	(203,354)
Options expired	-
Balances — March 31, 2022	4,824,662	$	15.94
Exercisable — March 31, 2022	3,367,508	$	16.39

Performance Shares [Member]

Stockholders' Equity [Line Items]

Summary Of Stock Option Activity

	Stock Options Outstanding
			Weighted
	Number		average
	of shares		exercise price
Balances — December 31, 2021	1,200,097	$	13.11
Options granted	150,000
Options exercised	-
Options canceled	(615,875)
Options expired	-
Balances — March 31, 2022	734,222	$	13.51
Exercisable — March 31, 2022	302,547	$	11.48

2017 Employee Stock Purchase Plan [Member]

Stockholders' Equity [Line Items]

Schedule Of Fair Value Of Employee Stock Options

	Three-Month Periods Ended March 31,
	2022	2021
Expected term in years	0.5 - 1.0	0.5 - 1.0
Expected volatility	83%	91%
Risk-free interest rate	0.6 - 0.9%	0.07 - 0.08%
Dividend yield	—	—