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STOCKHOLDERS’ EQUITY (Tables)
 6 Months Ended
Jun. 30, 2024
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
June 30,		Six Months Ended
June 30,
2024202320242023
Compensation cost recognized:
    Selling, general & administrative$58 $229 $382 $824 
    Research & development14 94 23 181 
$72 $323 $405 $1,005 
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, 20231,152,714$3.07 3.18 years$38 
Granted519,7501.92 – – 
Forfeited, cancelled, or expired(184,582)2.68 – – 
Exercised(4,875)$2.02 —— 
Outstanding at June 30, 20241,483,007$2.05 2.10 years$852 
Exercisable at June 30, 2024479,129$3.68 3.03 years$453 
Schedule of Restricted Stock Unit (RSU) Activity
Restricted stock unit activity during the period indicated below is as follows:
Number of
RSUs		Weighted
Average
Grant Date
Fair Value
Outstanding at December 31, 202360,500$4.23 
Granted166,3432.22 
Vested and settled in shares(133,492)3.31 
Outstanding at June 30, 202493,351$1.96