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SIGNIFICANT CUSTOMERS, CONCENTRATION OF CREDIT RISK AND GEOGRAPHIC INFORMATION (Details) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2020 USD ($)	Sep. 30, 2019 USD ($)	Sep. 30, 2020 USD ($) segment customer	Sep. 30, 2019 USD ($)	Dec. 31, 2019 USD ($) customer
Significant Customers, Concentration of Credit Risk and Geographic Information
Number of operating segments | segment			1
Revenue, net	$ 1,548	$ 2,157	$ 4,941	$ 5,613
Allowance for doubtful accounts	$ 0		$ 0		$ 0
Net revenue | Customer Concentration Risk | Customer A
Significant Customers, Concentration of Credit Risk and Geographic Information
Concentration risk (as a percent)	24.00%	39.00%		35.00%
Net revenue | Customer Concentration Risk | Customer B
Significant Customers, Concentration of Credit Risk and Geographic Information
Concentration risk (as a percent)	11.00%			11.00%
Net revenue | Customer Concentration Risk | Customer C
Significant Customers, Concentration of Credit Risk and Geographic Information
Concentration risk (as a percent)		10.00%	39.00%
Net revenue | Customer Concentration Risk | Customer D
Significant Customers, Concentration of Credit Risk and Geographic Information
Concentration risk (as a percent)	10.00%
Net revenue | Customer Concentration Risk | Customer E
Significant Customers, Concentration of Credit Risk and Geographic Information
Concentration risk (as a percent)			10.00%
Net revenue | Geographic Concentration Risk
Significant Customers, Concentration of Credit Risk and Geographic Information
Revenue, net	$ 1,548	$ 2,157	$ 4,941	$ 5,613
Net revenue | Geographic Concentration Risk | United states
Significant Customers, Concentration of Credit Risk and Geographic Information
Revenue, net	512	1,153	1,934	2,823
Net revenue | Geographic Concentration Risk | Asia and Middle East
Significant Customers, Concentration of Credit Risk and Geographic Information
Revenue, net	935	867	2,577	2,296
Net revenue | Geographic Concentration Risk | Europe and other
Significant Customers, Concentration of Credit Risk and Geographic Information
Revenue, net	101	$ 137	$ 430	$ 494
Accounts receivable | Credit Concentration Risk
Significant Customers, Concentration of Credit Risk and Geographic Information
Number of customers | customer			2		4
Accounts receivable | Credit Concentration Risk | Customer One
Significant Customers, Concentration of Credit Risk and Geographic Information
Concentration risk (as a percent)			40.00%		29.00%
Accounts receivable | Credit Concentration Risk | Customer Two
Significant Customers, Concentration of Credit Risk and Geographic Information
Concentration risk (as a percent)			11.00%		20.00%
Accounts receivable | Credit Concentration Risk | Customer Three
Significant Customers, Concentration of Credit Risk and Geographic Information
Concentration risk (as a percent)					11.00%
Accounts receivable | Credit Concentration Risk | Customer Four
Significant Customers, Concentration of Credit Risk and Geographic Information
Concentration risk (as a percent)					11.00%
Assets | Geographic Concentration Risk
Significant Customers, Concentration of Credit Risk and Geographic Information
Total long-lived assets	654		$ 654		$ 804
Assets | Geographic Concentration Risk | United states
Significant Customers, Concentration of Credit Risk and Geographic Information
Total long-lived assets	212		212		200
Assets | Geographic Concentration Risk | Asia
Significant Customers, Concentration of Credit Risk and Geographic Information
Total long-lived assets	$ 442		$ 442		$ 604

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