TAX CREDITS RECEIVABLE, NET - Additional Information (Details) - USD ($)	1 Months Ended	3 Months Ended
	Jan. 31, 2020	Sep. 30, 2020	Dec. 31, 2019
Tax Credit Receivable Net [Line Items]
License fees	$ 15,000,000
Tax credit certificates amount withdrawn	9,400,000
Tax credits receivable net of allowance		$ 30,400,000	$ 53,000,000
Increased allowance on remaining tax credits receivable balance		2,700,000
Monetization of tax credits		$ 0
Sellers’ Agreement
Tax Credit Receivable Net [Line Items]
Cash proceeds from sale of assets	15,000,000
Sellers’ Agreement | Maximum
Tax Credit Receivable Net [Line Items]
Earnout payment receivable	$ 5,000,000