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Balance Sheets (Unaudited) (Parenthetical) - USD ($) $ in Thousands | Sep. 30, 2023 | Dec. 31, 2022
--- | --- | ---
ASSETS |  |
Other physical property, accumulated depreciation | $ 484 | $ 463
CURRENT ASSETS: |  |
Accounts receivables, reserves | $ 875 | $ 855
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) | 14,320,737 | 14,285,584
Common stock, outstanding (in shares) | 14,320,737 | 14,285,584
Preferred stock, authorized (in shares) | 500,000 | 500,000
Preferred stock, issued (in shares) | 0 | 0

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