INDEBTEDNESS - Outstanding (Details) - Senior Secured Credit Facility [Member] $ in Millions	Sep. 30, 2021 USD ($)
Term Loan [Member]
Borrowing on debt	$ 62.3
Delayed Draw Term Loan [Member]
Borrowing on debt	109.2
Revolver [Member]
Borrowing on debt	31.5
Total debt issuance costs, net	0.6
Debt issuance costs, noncurrent	0.3
Debt issuance costs, current	$ 0.3

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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