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Short-term and long-term debt (Details) - USD ($)
$ in Thousands
Sep. 30, 2021
Dec. 31, 2020
Short-term debt:    
- Revolving credit line $ 7,000 $ 2,000
- Loan from Paycheck Protection Program- current 0 2,062
- Capital lease obligation- current 0 4
- Term loan facility - current 5,248 5,248
Subtotal 12,248 9,314
Long-term debt:    
- Term loan facility- net of current portion of long-term debt 75,931 79,867
- Loan from Paycheck Protection Program- net of current portion 0 413
- Less: deferred financing costs on term loan (1,683) (2,304)
Subtotal 74,248 77,976
Total short-term & long-term debt $ 86,496 $ 87,290