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Lease Obligations - Summary of lease related costs (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
Lease cost:        
Amortization of right-of-use assets $ 218 $ 186 $ 656 $ 375
Interest on lease liabilities 47 1 75 3
Operating lease cost 3,265 2,469 6,388 4,955
Variable lease costs 102 78 211 156
Total lease cost $ 3,632 $ 2,734 $ 7,330 $ 5,489