SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Narrative) (Details)	12 Months Ended
	Dec. 31, 2018 USD ($) financial_institution Lease	Dec. 31, 2017 USD ($)	Jan. 01, 2019 USD ($)
Accounting Policies [Abstract]
Number of financial institutions | financial_institution	1
Restricted cash balance	$ 211,000
Income Taxes
Unrecognized tax benefits	0	$ 0
Income tax penalties and interest expense	$ 0	$ 0
Accounting Standards Update 2016-02
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Number of Leases | Lease	2
Subsequent Event | Forecast | Accounting Standards Update 2016-02
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Right-of-Use asset			$ 3,000,000
Operating lease liability			$ 3,000,000
Minimum
Property, Plant and Equipment [Line Items]
Useful lives	3 years
Maximum
Property, Plant and Equipment [Line Items]
Useful lives	5 years