SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Narrative) (Details)	3 Months Ended		6 Months Ended
	Jun. 30, 2016 USD ($) customer financial_institution	Jun. 30, 2015 USD ($)	Jun. 30, 2016 USD ($) customer financial_institution	Jun. 30, 2015 USD ($)	Dec. 31, 2015 USD ($)
Deferred Finance Costs
Held to maturity securities	$ 4,300,000		$ 4,300,000
Unrealized gain or loss	$ 0		$ 0
Concentration Risks, Types, No Concentration Percentage [Abstract]
Number of financial institutions where the Company holds checking deposits | financial_institution	1		1
Revenue Recognition [Abstract]
Deferred revenue received in the period			$ 80,000
Revenue recognized	$ 10,000		10,000
Income Taxes
Income tax penalties and interest accrued	0		0		$ 0
Income tax penalties and interest expense	0	$ 0	0	$ 0
Deferred revenue
Revenue Recognition [Abstract]
Revenue recognized	$ 53,000		$ 80,000
Deferred revenue | Customer Concentration Risk
Revenue Recognition [Abstract]
Number of customers | customer	2		2
Minimum
Property and Equipment
Useful life (in years)			3 years
Maximum
Property and Equipment
Useful life (in years)			5 years
Commercial Paper
Deferred Finance Costs
Held to maturity securities	$ 1,500,000		$ 1,500,000
Incremental maturity amount			750,000
Certificates of Deposit
Deferred Finance Costs
Held to maturity securities	2,800,000		2,800,000
Incremental maturity amount			250,000
Certificates of Deposit | Foreign Debt Securities
Investments
Investment income	$ 2,000	$ 8,000	$ 6,000	$ 16,000