SHARE PURCHASE AND SUBSCRIPTION AGREEMENTS - Myrtle Grove Share Purchase and Subscription Agreement (Details) - USD ($) $ in Millions		9 Months Ended
Jul. 25, 2019	Sep. 30, 2020
Common Class B and Class A
Class of Stock
Annual return (as a percent)		22.50%
Percentage of aggregate capital investment to be added to original per-unit price to determine cash purchase price (as a percent)	50.00%	50.00%
Tensile-MG \| Common Class B
Class of Stock
Percentage of voting power of the outstanding voting securities (more than) (as a percent)	50.00%
Tensile-MG \| MG SPV \| Common Class B
Class of Stock
Restricted cash and cash equivalents		$ 2.0

Amount of cash and cash equivalents restricted as to withdrawal or usage. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant