SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES, Reimbursable Third-Party Patent Costs, Third party Royalties and Royalty Buy-Down (Details) $ in Thousands		3 Months Ended			9 Months Ended
	Jan. 01, 2018 USD ($)	Sep. 30, 2018 USD ($)	Sep. 30, 2017 USD ($)	Mar. 31, 2012 USD ($) Payment	Sep. 30, 2018 USD ($) Payment	Sep. 30, 2017 USD ($)	Dec. 31, 2017 USD ($)
Reimbursable Third-Party Patent Costs [Abstract]
Accrued patent costs		$ 40			$ 40		$ 0
Third-Party Royalties [Abstract]
Royalty expenses		600	$ 400		$ 1,700	$ 1,400
Royalty Buy-Down [Abstract]
Initial payment for royalty buy down	$ 600			$ 1,500
Number of additional cash payments for royalty buy-down | Payment				5
Number of cash payments made for royalty obligation | Payment					5
Deferred costs, amortization period					5 years
Amount amortized related to agreement		600	$ 400		$ 1,600	$ 1,100
Deferred royalty buy-down		$ 600			$ 600		$ 2,500