COMMITMENTS AND CONTINGENCIES (Details Textual) $ in Thousands		1 Months Ended	3 Months Ended		6 Months Ended		12 Months Ended
	Oct. 02, 2017	Oct. 31, 2017	Jun. 30, 2019 USD ($)	Jun. 30, 2018 USD ($)	Jun. 30, 2019 USD ($)	Jun. 30, 2018 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($) a
Commitments and Contingencies [Line Items]
Recovery of credit losses			$ (1,135)	$ (175)	$ (1,135)	$ (175)
Employer match percentage					4.00%
Employer contribution in period			$ 100	$ 100
Fund expense reimbursements					$ (600)
Intercreditor Agreement Claim
Commitments and Contingencies [Line Items]
Amount sought by third party								$ 300
Pending Litigation | RNMA I
Commitments and Contingencies [Line Items]
Amount sought by third party							$ 3,100
New Mexico | Pending Litigation | Maniatis
Commitments and Contingencies [Line Items]
Area of land (in acres) | a								7,000
Texas | Pending Litigation
Commitments and Contingencies [Line Items]
Area of land (in acres) | a								111
Hotel
Commitments and Contingencies [Line Items]
Fund expense reimbursements					$ (100)
Hotel | MacArthur Loan | MacArthur Place
Commitments and Contingencies [Line Items]
Repayment guaranty	50.00%	50.00%
L’Auberge Fund Manager, LLC | Preferred Interests
Commitments and Contingencies [Line Items]
Selling commissions as % of gross proceeds					6.00%
Nonaccountable expense reimbursements broker-dealers as percent of gross proceeds					1.00%