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CONDENSED STATEMENTS OF OPERATIONS - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Income Statement [Abstract]    
REVENUES $ 4,254 $ 3,395
COST OF REVENUES (332) (316)
Gross profit 3,922 3,079
OPERATING EXPENSES    
Selling, general and administrative 3,924 2,943
Research and development 1,308 1,604
Total operating expenses 5,232 4,547
Loss from operations (1,310) (1,468)
OTHER INCOME    
Interest and other income 1 0
Total other income 1 0
Net loss before provision for income taxes (1,309) (1,468)
Provision for income taxes 7 0
Net loss $ (1,316) $ (1,468)
Loss per common share -    
Basic (in dollars per share) $ (0.07) $ (0.08)
Diluted (in dollars per share) $ (0.07) $ (0.08)
Weighted average common shares used in computing per share amounts -    
Basic (in shares) 19,088,752 18,674,493
Diluted (in shares) 19,088,752 18,674,493