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NOTES PAYABLE - Term Loan Due to Former Non-Controlling Interest Holder (Details) - USD ($) $ in Millions	1 Months Ended		6 Months Ended
	May 31, 2020	Jun. 30, 2018	Jun. 30, 2021	Dec. 31, 2020
Debt Instrument [Line Items]
Payment to acquire noncontrolling interest		$ 8.1
Term Loan Due To Former Non-Controlling Interest Holder | Term Loan
Debt Instrument [Line Items]
Fixed interest rate, quarterly		4500.00%
Fixed interest rate, annual		18.00%
Prepaid principal and interest	$ 1.5
Prepaid principal	$ 1.0
Warrants issued (in shares)	400,000
Unamortized discount	$ 0.2
Outstanding balance				$ 5.8
Debt instrument, prepayment penalties			$ 2.6

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