INDEBTEDNESS - Outstanding (Details) - Senior Secured Credit Facility [Member] $ in Millions	Mar. 31, 2021 USD ($)
Term Loan [Member]
Borrowing on debt	$ 65.0
Delayed Draw Term Loan [Member]
Borrowing on debt	112.1
Revolver [Member]
Borrowing on debt	7.5
Total debt issuance costs, net	0.7
Debt issuance costs, current	0.3
Debt issuance costs, noncurrent	$ 0.4

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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