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Balance Sheets (Unaudited) (Parenthetical) - USD ($)
$ in Thousands
Jun. 30, 2024
Dec. 31, 2023
ASSETS    
Other physical property, accumulated depreciation $ 520 $ 501
CURRENT ASSETS:    
Accounts receivables, reserves $ 1,305 $ 1,005
COMMON STOCKHOLDERS' EQUITY:    
Common stock, par value (in dollars per share) $ 0 $ 0
Common stock, authorized (in shares) 46,500,000 46,500,000
Common stock, issued (in shares) 14,361,225 14,332,245
Common stock, outstanding (in shares) 14,361,225 14,332,245
Preferred stock, authorized (in shares) 500,000 500,000
Preferred stock, issued (in shares) 0 0