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Schedule of Components of Restricted Stock Liabilities (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2022 | Dec. 31, 2021
Restricted Stock Liabilities |  |
Restricted stock liabilities (before imputed interest) | $ 2,307 | $ 3,801
Less imputed interest | (78) | (177)
Present value of restricted stock liabilities | 2,229 | 3,624
Less payments during the period | (710) | (1,472)
Restricted stock liabilities at end of period (reflected in accrued expenses and other) | $ 1,519 | $ 2,152

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