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Note 8 - Commitments (Details Textual)
12 Months Ended
Jun. 01, 2019
USD ($)
ft²
May 22, 2019
USD ($)
Apr. 01, 2016
USD ($)
ft²
Dec. 15, 2014
USD ($)
ft²
Dec. 31, 2019
USD ($)
ft²
Dec. 31, 2018
USD ($)
Operating Lease, Weighted Average Discount Rate, Percent         4.33%  
Operating Lease, Impairment Loss         $ 0  
Operating Lease, Liability, Current         252,000
Operating Lease, Liability, Noncurrent         453,000
Operating Lease, Right-of-Use Asset         676,000
Operating Leases, Rent Expense, Net, Total         $ 164,000 $ 151,000
Lease for Headquarters [Member]            
Area of Real Estate Property | ft² 9,910          
Lessee, Operating Lease, Term of Contract 5 years 60 days          
Operating Lease Monthly Rent $ 9,910          
Monthly Rent Step-up Percentage 3.00%          
Simi Valley California [Member]            
Area of Real Estate Property | ft²       15,160    
Lessee, Operating Lease, Term of Contract       3 years    
Operating Lease Monthly Rent   $ 12,886   $ 11,000    
Monthly Rent Step-up Percentage       3.00%    
Lessee, Operating Lease, Renewal Term       3 years    
Stillwater Agency, Inc. [Member]            
Operating Leases, Sublease, Percentage of Total Operating Expenses and Taxes Expense for Subleased Office Building   9.00%        
Westlake Village, California [Member]            
Area of Real Estate Property | ft²         5,400  
Operating Lease Monthly Rent         $ 11,000  
Monthly Rent Step-up Percentage         3.00%  
Operating Leases, Monthly Sublease Rent         $ 12,000  
Operating Leases, Sublease, Monthly Rent Step-up Percentage         3.00%  
Lease in Singapore [Member]            
Area of Real Estate Property | ft²     1,359      
Lessee, Operating Lease, Term of Contract     2 years      
Operating Lease Monthly Rent     $ 2,500