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Note 3 - Lease Obligations (Details Textual)
3 Months Ended
Mar. 31, 2022
USD ($)
ft²
Mar. 31, 2021
USD ($)
Dec. 31, 2021
USD ($)
Feb. 28, 2020
USD ($)
Operating Lease, Right-of-Use Asset $ 338,000   $ 365,000  
Operating Lease, Expense 43,000 $ 42,000    
Operating Lease, Payments $ 43,000 $ 40,000    
Retail / Office Space in Seattle, Washington [Member]        
Area of Real Estate Property (Square Foot) | ft² 6,500      
Lessee, Operating Lease, Term of Contract (Year)       5 years
Operating Lease, Right-of-Use Asset       $ 556,000
Lessee, Operating Lease, Discount Rate 4.00%      
Operating Lease, Weighted Average Remaining Lease Term (Year) 2 years 11 months 1 day