FAIR VALUE (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended
	Feb. 09, 2018	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Redeemable Convertible Preferred Stock, shares issued		10,552,941		8,200,000
Issuance of common stock warrants		$ 688
Expected stock price volatility		40.00%
Risk-free interest rate		2.26%
Expected life of warrants		3 years
Expected dividend yield		0.00%
Common Stock value discount for lack of marketability		25.00%
Recovery of credit losses		$ 0	$ (66)
Mortgage Receivable [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Valuation allowance		$ 12,700		$ 12,700
Loans receivable valuation allowance (percentage)		39.10%		39.20%
JPMorgan Chase Funding Inc. [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights	600,000
Class of Warrant or Right, Exercise Price of Warrants or Rights	$ 2.25
Class of Warrant or Right, Period	2 years
Series B-3 Cumulative Convertible Preferred Stock [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated Fair Value per Share		$ 4.12
Series B-3 Cumulative Convertible Preferred Stock [Member] | JPMorgan Chase Funding Inc. [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Redeemable Convertible Preferred Stock, shares issued	2,352,941
Series B Preferred Stock [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated Fair Value per Share		$ 1.52
Warrants Not Settleable in Cash, Fair Value Disclosure		$ 900
Series B Preferred Stock [Member] | JPMorgan Chase Funding Inc. [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Preferred Stock, Value, Subscriptions	$ 8,000
Paid-In Capital [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Issuance of common stock warrants		$ 688