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CONDENSED STATEMENTS OF OPERATIONS - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Income Statement [Abstract]    
REVENUES $ 4,680 $ 4,254
COST OF REVENUES (435) (332)
Gross profit 4,245 3,922
OPERATING EXPENSES    
Selling, general and administrative 3,949 3,995
Research and development 819 1,308
Total operating expenses 4,768 5,303
Loss from operations (523) (1,381)
OTHER INCOME    
Interest and other income 83 1
Total other income 83 1
Net loss before provision for income taxes (440) (1,380)
Provision for income taxes 2 7
Net loss $ (442) $ (1,387)
Loss per common share -    
Basic (in dollars per share) $ (0.02) $ (0.07)
Diluted (in dollars per share) $ (0.02) $ (0.07)
Weighted average common shares used in computing per share amounts -    
Basic (in shares) 19,404,561 19,088,752
Diluted (in shares) 19,404,561 19,088,752