Long-Term Debt - Summary of long term debt (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Debt Instrument
Long-term debt	$ 6,560	$ 6,019
Less current portion	(849)	(849)
Long-term debt, Noncurrent	5,711	5,170
Line of credit payable to a financial institution; Interest rate option of bank prime or Libor plus 1.4% (3.07% as of March 31, 2020) (A) (B)
Debt Instrument
Long-term debt	3,750	3,000
Term loan payable to a financial institution; Interest rate option of bank prime or Libor plus 1.4% (2.981130% as of March 31, 2020), monthly principal payments of $21,833 through 2021 with a balloon payment of $786,000 due December 1, 2021 (
Debt Instrument
Long-term debt	1,245	1,310
Term loan payable to a financial institution; Interest rate option of bank prime or Libor plus 1.4% (2.981130% as of March 31, 2020), monthly principal payments of $23,810 through December 1, 2021
Debt Instrument
Long-term debt	500	571
Equipment note obligations; Interest rate fixed for term of each funding based upon the Lender's lease pricing at time of funding. (Interest rate/factor 1.8259% - 1.835015% as of March 31, 2020) (C)
Debt Instrument
Long-term debt	637	670
Equipment financing lease obligations; Interest rate fixed for term of each funding based upon the Lender's lease pricing at time of funding. (Interest rate/factor 3.3943% - 3.8527% at time of funding) (D)
Debt Instrument
Long-term debt	$ 428	$ 468