Long Term Debt - Term Loan Interest Expense (Details) - Term loan - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2021	Mar. 31, 2020
Hayfin Loan Agreement Term Loan
Debt Instrument [Line Items]
Interest on principal balance	$ 1,031
Accretion of original issue discount	13
Amortization of deferred financing costs	89
Total BT Term Loan interest expense	1,133
Hayfin Loan Agreement Delayed Draw Term Loan
Debt Instrument [Line Items]
Commitment fee	63
Accretion of original issue discount	41
Amortization of deferred financing costs	271
Total BT Term Loan interest expense	$ 375
BT Term Loan
Debt Instrument [Line Items]
Interest on principal balance		$ 1,840
Accretion of original issue discount		167
Amortization of deferred financing costs		491
Total BT Term Loan interest expense		$ 2,498

Debt Instrument, Commitment Fees

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Amount of noncash expense included in interest expense to amortize debt discount and premium associated with the related debt instruments. Excludes amortization of financing costs. Alternate captions include noncash interest expense.

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Amount of amortization expense attributable to debt issuance costs.

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Amount of the cost of borrowed funds accounted for as interest expense for debt.

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Represents the portion of interest incurred in the period on debt arrangements that was charged against earnings, excluding amortization of debt discount (premium) and financing costs.

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