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Commitments and Contingencies (Details) - USD ($)
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Commitments and Contingencies      
Operating lease expense $ 812,000 $ 566,000 $ 712,000
Operating Lease Cost      
Short term lease expense 207,000 118,000 85,000
Variable lease expense 107,000 105,000 102,000
Sub lease income 0 0 (117)
Total operating lease cost 1,126,000 789,000 782,000
Finance lease cost      
Amortization of right-of-use-assets 230,000 249,000 0
Interest on lease liabilities 81,000 68,000 0
Total finance lease cost $ 311,000 $ 317,000 $ 0