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Other Assets and Liabilities - Accrued Expenses (Details) - USD ($)
$ in Thousands
Jun. 30, 2021
Dec. 31, 2020
Accrued Expenses    
Accrued compensation $ 1,504 $ 1,697
Accrued restructuring (see Note 12) 177 520
Customer allowances 821 1,030
Accrued outsource contract costs 837 473
Other 4,185 2,781
Total   $ 7,524 $ 6,501