LEASES Narrative (Details) $ in Thousands		3 Months Ended		6 Months Ended
	Jan. 01, 2019	Jun. 30, 2019 USD ($)	Jun. 30, 2018 USD ($)	Jun. 30, 2019 USD ($) Lease	Jun. 30, 2018 USD ($)	Dec. 31, 2018 USD ($)
Lessee, Lease, Description [Line Items]
Number of operating leases | Lease				2
Restricted cash		$ 211	$ 211	$ 211	$ 211	$ 211
Weighted average incremental borrowing rate	4.75%
Operating lease, cost		263		527
Cash paid for operating lease liabilities				269
Research and development expenses
Lessee, Lease, Description [Line Items]
Operating lease, cost		196		393
Sales, marketing and administration expenses
Lessee, Lease, Description [Line Items]
Operating lease, cost		67	$ 142	134	$ 284
Corporate Headquarters
Lessee, Lease, Description [Line Items]
Deposits		50		50
Restricted cash		$ 211		211
Letter of Credit | Corporate Headquarters
Lessee, Lease, Description [Line Items]
Operating lease deposit, letter of credit				$ 200
Letter of credit annual step down of no default payment						$ 50
Minimum | Facilities
Lessee, Lease, Description [Line Items]
Operating lease renewal periods		2 years		2 years
Maximum | Facilities
Lessee, Lease, Description [Line Items]
Operating lease renewal periods		5 years		5 years
Maximum | Facilities and Equipment
Lessee, Lease, Description [Line Items]
Operating lease term		12 months		12 months