Stock-Based Compensation (Tables)

9 Months Ended

Sep. 30, 2022

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Schedule of Options Activity

Stock Options

	Stock Options			Weighted Average Exercise Price		Weighted Average Remaining Life (in years)		Aggregate Intrinsic Value (in thousands)
Outstanding at December 31, 2021		2,168		$	17,277
Canceled/forfeited		(741	)	$	19,266
Outstanding at September 30, 2022		1,427		$	16,244		4.07	$	—
Exercisable at September 30, 2022		1,251		$	18,342		3.60	$	—
Vested and expected to vest at September 30, 2022		1,427		$	16,244		4.07	$	—

Schedule of Restricted Stock Units Activity

Restricted Stock Units

	Restricted Stock Units			Weighted Average Grant Date Fair Value
Outstanding at December 31, 2021		1,400		$	219
Vested		(117	)	$	609
Canceled/forfeited		(1,208	)	$	168
Outstanding at September 30, 2022		75		$	416

Schedule of Restricted Stock Awards Activity

Restricted Stock Awards

	Restricted Stock Awards			Weighted Average Grant Date Fair Value
Outstanding at December 31, 2021		3,586		$	236
Vested		(1,266	)	$	239
Canceled/forfeited		(966	)	$	211
Outstanding at September 30, 2022		1,354		$	249

Schedule of Stock-based Compensation Expense Included in Operating Expenses

The following table summarizes stock-based compensation expense for the Plans included in operating expenses for the periods presented (in thousands):

	Three Months Ended September 30,					Nine Months Ended September 30,
	2022			2021		2022		2021
Selling, general and administrative	$	85		$	78	$	302	$	1,551
Research and development		(11	)		27		57		251
Stock-based compensation in operating expenses	$	74		$	105	$	359	$	1,802

Schedule of Unrecognized Estimated Stock Based Compensation Expense by Award Type

Unrecognized stock-based compensation expense by award type and the remaining weighted average recognition period over which such expense is expected to be recognized as of September 30, 2022 was as follows:

	Unrecognized Expense (in thousands)		Remaining Weighted Average Recognition Period (in years)
Stock options	$	122		1.3
Restricted stock awards	$	233		1.4
Restricted stock units	$	20		1.2