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Quarterly Results (unaudited) (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 12 Months Ended
Dec. 31, 2023
Sep. 30, 2023
Jun. 30, 2023
Mar. 31, 2023
Dec. 31, 2022
Sep. 30, 2022
Jun. 30, 2022
Mar. 31, 2022
Dec. 31, 2023
Dec. 31, 2022
Quarterly Results (unaudited)                    
Revenues $ 1,274 $ 85 $ 150 $ 894 $ 50 $ 324 $ 0 $ 0 $ 2,403 $ 374
Gross Profit (Loss) 558 24 129 106 (7) 123     817 116
Operating Expense 1,709 1,521 1,758 1,810 1,498 1,558 1,660 1,517 6,798 6,233
Net loss attributed to common stockholders $ (955) $ (1,332) $ (1,478) $ (1,429) $ (1,318) $ (1,312) $ (1,638) $ (1,490) $ (5,194) $ (5,758)
Net loss per share - basic $ (0.03) $ (0.03) $ (0.04) $ (0.04) $ (0.03) $ (0.03) $ (0.05) $ (0.05) $ (0.13) $ (0.16)
Net loss per share - fully diluted $ (0.03) $ (0.03) $ (0.04) $ (0.04) $ (0.03) $ (0.03) $ (0.05) $ (0.05) $ (0.13) $ (0.16)