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Nature of Operations, Background, and Basis of Presentation - Liquidity (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Dec. 31, 2021
Nature of Operations, Background, and Basis of Presentation [Abstract]      
Net loss $ (3,739) $ (2,628)  
Accumulated deficit (32,266)   $ (28,779)
Working capital, Net 5,200    
Cash and cash equivalents $ 3,063 $ 2,969