DEBT - Long-term Debt (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Debt Instrument [Line Items]
Total debt	$ 106,176	$ 58,259
Debt Issuance Costs	(5,165)	(1,063)
Less current portion	3,426	2,425
Long-term debt	$ 102,750	55,834
Earnout Notes Payable
Debt Instrument [Line Items]
Stated interest rate (percent)	2.00%
Term Loan \| 2021 Term Loan Credit Agreement
Debt Instrument [Line Items]
Interest rate at period end (percent)	6.50%
Total debt	$ 99,750	0
Debt Issuance Costs	(4,085)	0
Less current portion	$ 1,000	$ 0
Senior Secured Asset-Based Loan \| Senior Secured Asset-Based Loan
Debt Instrument [Line Items]
Interest rate at period end (percent)	1.58%	2.73%
Total debt	$ 4,000	$ 53,408
Debt Issuance Costs	$ (1,080)	$ (1,063)
Note Payable \| Earnout Notes Payable
Debt Instrument [Line Items]
Stated interest rate (percent)	2.00%	2.00%
Total debt	$ 2,426	$ 4,851
Debt Issuance Costs	0	0
Less current portion	$ 2,426	$ 2,425

Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

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Contractual interest rate for funds borrowed, under the debt agreement.

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Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt, classified as current. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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Amount after unamortized (discount) premium and debt issuance costs of long-term debt classified as noncurrent and excluding amounts to be repaid within one year or the normal operating cycle, if longer. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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