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ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details Narrative) $ in Thousands | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 30, 2021 USD ($) | Sep. 30, 2020 USD ($) | Sep. 30, 2021 USD ($) Segment | Sep. 30, 2020 USD ($) | Dec. 31, 2020 USD ($)
Product Information [Line Items] |  |  |  |  |
Cumulative inventory write-downs | $ 0 | $ 2,400 | $ 0 | $ 2,400 |
Number of operating segment | Segment |  |  | 1 |  |
Revenue Benchmark [Member] | Sales to Telecommunications Customers [Member] | Revenue from Rights Concentration Risk [Member] |  |  |  |  |
Product Information [Line Items] |  |  |  |  |
Concentration risk | 85.00% | 99.00% | 90.00% | 96.00% |
Revenue Benchmark [Member] | Sales to Telecommunications Customers [Member] | Largest Customer One [Member] | Customer Concentration Risk [Member] |  |  |  |  |
Product Information [Line Items] |  |  |  |  |
Concentration risk | 62.00% | 41.00% | 67.00% | 57.00% |
Revenue Benchmark [Member] | Sales to Telecommunications Customers [Member] | Largest Customer Two [Member] | Customer Concentration Risk [Member] |  |  |  |  |
Product Information [Line Items] |  |  |  |  |
Concentration risk |  | 27.00% |  | 13.00% |
Revenue Benchmark [Member] | Sales to Telecommunications Customers [Member] | Largest Customer Three [Member] | Customer Concentration Risk [Member] |  |  |  |  |
Product Information [Line Items] |  |  |  |  |
Concentration risk |  | 23.00% |  | 12.00% |
Revenue Benchmark [Member] | Sales to Telecommunications Customers [Member] | Largest Customer Four [Member] | Customer Concentration Risk [Member] |  |  |  |  |
Product Information [Line Items] |  |  |  |  |
Concentration risk |  |  |  | 11.00% |
Accounts Receivable [Member] | Largest Customer One [Member] | Customer Concentration Risk [Member] |  |  |  |  |
Product Information [Line Items] |  |  |  |  |
Concentration risk |  |  | 73.00% |  | 87.00%
Accounts Receivable [Member] | Largest Customer Two [Member] | Customer Concentration Risk [Member] |  |  |  |  |
Product Information [Line Items] |  |  |  |  |
Concentration risk |  |  | 10.00% |  |
Accounts Payable [Member] | Largest Vendors One [Member] | Supplier Concentration Risk [Member] |  |  |  |  |
Product Information [Line Items] |  |  |  |  |
Concentration risk |  |  | 13.00% |  |
Accounts Payable [Member] | Largest Vendors Two [Member] | Supplier Concentration Risk [Member] |  |  |  |  |
Product Information [Line Items] |  |  |  |  |
Concentration risk |  |  | 10.00% |  | 9.00%
Accounts Payable [Member] | Largest Vendors Three [Member] | Supplier Concentration Risk [Member] |  |  |  |  |
Product Information [Line Items] |  |  |  |  |
Concentration risk |  |  | 8.00% |  | 8.00%
Accounts Payable [Member] | Largest Vendors One [Member] | Supplier Concentration Risk [Member] |  |  |  |  |
Product Information [Line Items] |  |  |  |  |
Concentration risk |  |  |  |  | 10.00%
AUSTRALIA |  |  |  |  |
Product Information [Line Items] |  |  |  |  |
Cash | $ 12 |  | $ 12 |  | $ 10
RON [Member] |  |  |  |  |
Product Information [Line Items] |  |  |  |  |
Cash | $ 20 |  | $ 20 |  | $ 28
Non-US [Member] | Revenue Benchmark [Member] | Sales to Telecommunications Customers [Member] | Revenue from Rights Concentration Risk [Member] |  |  |  |  |
Product Information [Line Items] |  |  |  |  |
Concentration risk | 7.00% | 23.00% | 10.00% | 13.00% |

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