Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Policies (Details)

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Summary of Significant Accounting Policies (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
COVID-19 Risks, Impacts and Uncertainties    
Net income (loss) $ (12,491) $ (1,341)
Cash and cash equivalents 37,830 28,577
Proceeds from the issuance of common stock pursuant to exercise of stock options $ 80 $ 83