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Revenue (Details 2) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Mar. 31, 2022
Dec. 31, 2021
Contract Assets    
Revenue Recognized That Was Included In The Contract Liability Balance At The Beginning Of The Period $ 0 $ 0
Increase Due To Cash Received, Excluding Amounts Recognized As Revenue During The Period 0 0
Transferred To Receivables From Contract Assets Recognized At The Beginning Of The Period (46) (60)
Increase Due To Additional Unamortized Discounts 25 162
Contract Liabilities    
Revenue Recognized That Was Included In The Contract Liability Balance At The Beginning Of The Period (1,524) (1,137)
Increase Due To Cash Received, Excluding Amounts Recognized As Revenue During The Period 1,281 2,937
Transferred To Receivables From Contract Assets Recognized At The Beginning Of The Period 0 0
Increase Due To Additional Unamortized Discounts $ 0 $ 0