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Fair Value Measurements and Short-term Investments (Details Narrative) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Jun. 30, 2023
Jun. 30, 2022
Dec. 31, 2022
Fair Value Disclosures [Abstract]          
Primarily of interest earned $ 41,000 $ 0 $ 41,000 $ 0  
Cash equivalents 2,100,000   2,100,000   $ 1,200,000
Short-term investments $ 2,523,000   $ 2,523,000