LEASES Narrative (Details)		3 Months Ended		6 Months Ended
	Jan. 01, 2019	Jun. 30, 2020 USD ($) lease_options Lease	Jun. 30, 2019 USD ($)	Jun. 30, 2020 USD ($) lease_options Lease	Jun. 30, 2019 USD ($)	May 01, 2020 Lease	Dec. 31, 2019 USD ($)
Lessee, Lease, Description [Line Items]
Number of operating leases | Lease				2
Number of non-cancelable leases | Lease		2		2
Number of Leases Amended | Lease						1
Restricted cash		$ 150,000	$ 211,000	$ 150,000	$ 211,000		$ 150,000
Number of lease renewal options recognized | lease_options		0		0
Weighted average incremental borrowing rate	4.75%
Operating lease, cost		$ 279,000	263,000	$ 562,000	527,000
Cash paid for operating lease liabilities				276,000	269,000
Research and development expenses
Lessee, Lease, Description [Line Items]
Operating lease, cost		203,000	196,000	412,000	393,000
Sales, marketing and administration expenses
Lessee, Lease, Description [Line Items]
Operating lease, cost		76,000	$ 67,000	150,000	$ 134,000
Corporate Headquarters
Lessee, Lease, Description [Line Items]
Deposits		50,000		50,000
Restricted cash		150,000		150,000
Letter of Credit
Lessee, Lease, Description [Line Items]
Letter of credit annual step down		50,000		50,000
Letter of Credit | Corporate Headquarters
Lessee, Lease, Description [Line Items]
Operating lease deposit, letter of credit				150,000
Letter of credit annual step down of no default payment		$ 200,000		$ 200,000
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