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Commitments (Details Narrative)
$ in Thousands
 1 Months Ended 12 Months Ended
Aug. 31, 2018
USD ($)
ft²
Dec. 31, 2018
USD ($)
Dec. 31, 2017
USD ($)
Leases expire date description   The Company leases office and production facilities and equipment under agreements that expire at various dates through 2026.  
Short-term restricted cash   $ 50
Operating leases   528 510
Operating lease liabilities   3,500  
Operating right-of use assets, net of tenant improvement allowances   2,300  
Depreciation expenses   2,382 2,058
Carlsbad Lease [Member]      
Area of land | ft² 16,000    
Lease terms The term of the Carlsbad Lease is from December 2018 through April 2026.    
Lease extension term 5 years    
Option to renew the lease The Company has a one-time option to renew the lease for an additional five-year extension.    
Base rent abatement, description Base rent is abated by 50% for months two through nine of the term. Base rent escalates annually beginning in December 2019 by approximately 3.5% per year.    
Letter of credit to the lessor as a security amount $ 250    
Security amount reduced each year of beginning 50    
Carlsbad Lease [Member] | Avidbank [Member]      
Deposit amount as restricted cash account 250    
Restricted cash amount 250    
Short-term restricted cash 50    
Long-term restricted cash $ 200    
Covenant description The amount deposited in such account will not count toward the covenant under the Avidbank loan and security agreement that requires the Company to have an aggregate amount of unrestricted cash in deposit accounts or securities accounts maintained with Avidbank of not less than $2,000,000 at all times.    
Capital Leases [Member]      
Depreciation expenses   $ 81 $ 95