STOCKHOLDERS’ EQUITY (Tables)

9 Months Ended

Sep. 30, 2023

Equity [Abstract]

Schedule of Stock-Based Compensation Included in Operating Expenses

All stock-based compensation is included in operating expenses as follows:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2023		2022		2023		2022
Compensation cost recognized:
Selling, general & administrative	$	301	$	561	$	1,125	$	1,270
Research & development	41		168		222		498
	$	342	$	729	$	1,347	$	1,768

Schedule of Stock Option Activity

Stock option activity under the 2015 Plan during the period indicated below is as follows:

	Number of Shares Subject to Issuance	Weighted- average Exercise Price		Weighted- average Remaining Contractual Term	Aggregate Intrinsic Value
Outstanding at December 31, 2022	1,120,244	$	3.68	3.50 years	$	84
Granted	627,507	2.91		–	–
Forfeited, cancelled, or expired	(516,846)	3.89		–	–
Outstanding at September 30, 2023	1,230,905	$	2.33	3.08 years	$	135
Exercisable at September 30, 2023	593,494	$	3.69	2.10 years	$	73

Schedule of Restricted Stock Unit (RSU) Activity

Restricted stock unit activity during the period indicated below is as follows:

	Number of Shares	Weighted Average Grant Date Fair Value
Outstanding at December 31, 2022	214,892	$	8.43
Granted	207,306	2.43
Forfeited or surrendered	(70,959)	10.04
Vested and settled in shares	(278,057)	4.42
Outstanding at September 30, 2023	73,182	$	5.11

Schedule of Performance Stock Unit (PSU) Activity

	Number of Shares	Weighted Average Grant Date Fair Value
Outstanding at December 31, 2022	177,688	$	7.91
Forfeited	(88,844)	7.91
Vested and settled in shares	(88,844)	7.91
Outstanding at September 30, 2023	—	$	7.91