Long-Term Debt - Summary of long term debt (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Debt Instrument [Line Items]
Long-term debt	$ 4,190	$ 3,133
Less current portion	(844)	(723)
Long-term debt, Noncurrent	3,346	2,410
Term loan payable to a financial institution; Interest rate option of bank prime or Libor plus 1.4% (3.840% as of June 30, 2019), monthly principal payments of $21,833 through 2021 with a balloon payment of $786,000 due December 1, 2021
Debt Instrument [Line Items]
Long-term debt	1,375	1,572
Term loan payable to a financial institution; Interest rate option of bank prime or Libor plus 1.4% (3.840% as of June 30, 2019), monthly principal payments of $23,810 through December 1, 2021
Debt Instrument [Line Items]
Long-term debt	643	857
Line of credit payable to a financial institution; Interest rate option of bank prime 5.25%. Line of credit expires June 19, 2021
Debt Instrument [Line Items]
Long-term debt	1,000	0
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 1.822758% - 1.869304% at time of funding)
Debt Instrument [Line Items]
Long-term debt	511	704
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 3.3943% - 3.8527% at time of funding)
Debt Instrument [Line Items]
Long-term debt	$ 661	$ 0