Long Term Debt - Term Loan Interest Expense (Details) - Term loan - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Hayfin Loan Agreement Term Loan
Debt Instrument [Line Items]
Interest on principal balance	$ 1,031		$ 1,031
Amortization of deferred financing costs	90		90
Accretion of original issue discount	38		38
Total BT Term Loan interest expense	1,159		1,159
Hayfin Loan Agreement Delayed Draw Term Loan
Debt Instrument [Line Items]
Amortization of deferred financing costs	106		106
Accretion of original issue discount	125		125
Commitment fee	64		64
Total BT Term Loan interest expense	295		295
BT Term Loan
Debt Instrument [Line Items]
Interest on principal balance	42	$ 2,024	3,773	$ 2,417
Amortization of deferred financing costs	11	478	1,051	563
Accretion of original issue discount	4	158	354	189
Accretion of amendment fee	2	0	53	0
Total BT Term Loan interest expense	$ 59	$ 2,660	$ 5,231	$ 3,169