INDEBTEDNESS - Outstanding (Details) - Senior Secured Credit Facility [Member] - USD ($) $ in Millions	1 Months Ended
Dec. 31, 2018	Sep. 30, 2020
Debt Instrument, Term	5 years
Delayed Draw Term Loan [Member]
Debt Instrument, Term	5 years
Long-term Debt, Gross		$ 115.1
Total debt issuance costs, net		0.4
Debt issuance costs, current		0.1
Debt issuance costs, noncurrent		0.3
Term Loan [Member]
Long-term Debt, Gross		66.8
Total debt issuance costs, net		1.0
Debt issuance costs, current		0.3
Debt issuance costs, noncurrent		0.7
Revolver [Member]
Long-term Debt, Gross		7.5
Total debt issuance costs, net		0.8
Debt issuance costs, current		0.2
Debt issuance costs, noncurrent		$ 0.6

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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- Definition

Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

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

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

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