INDEBTEDNESS - Outstanding (Details) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended		6 Months Ended
	Dec. 31, 2018	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Amortization of Debt Issuance Costs		$ 180	$ 360	$ 362	$ 720
Senior Secured Credit Facility [Member]
Debt Instrument, Term	5 years
Senior Secured Credit Facility [Member] | Delayed Draw Term Loan [Member]
Debt Instrument, Term	5 years
Long-term Debt, Gross		116,500		116,500
Debt issuance costs, current and noncurrent		400		400
Debt issuance costs, noncurrent		300		300
Debt issuance costs, current		100		100
Senior Secured Credit Facility [Member] | Term Loan [Member]
Long-term Debt, Gross		67,700		67,700
Debt issuance costs, current and noncurrent		1,100		1,100
Debt issuance costs, noncurrent		700		700
Debt issuance costs, current		400		400
Senior Secured Credit Facility [Member] | Revolver [Member]
Long-term Debt, Gross		7,500		7,500
Debt issuance costs, current and noncurrent		900		900
Debt issuance costs, noncurrent		600		600
Debt issuance costs, current		$ 300		$ 300