Long-Term Debt - Long-term debt and lease financing obligations (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Debt Instrument [Line Items]
Unamortized debt discounts	$ (2,642)	$ (2,004)
Long-term debt, net of discounts	79,951	58,396
Term Loan Agreement
Debt Instrument [Line Items]
Borrowings under term loan agreements	80,000	60,000
Paid in-kind interest on term loan agreements	$ 2,593	$ 400