Condensed Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Condensed Balance Sheets
Reserves on trade accounts receivable (in dollars)	$ 154	$ 109
Notes, Fair value	$ 3,962	$ 3,679
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized	50,000,000	50,000,000
Common stock, shares issued	6,923,446	6,906,544
Common stock, shares outstanding	6,709,024	6,692,122
Treasury stock, shares	214,422	214,422