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Note 9 - Debt and Commitments (Details Textual)
1 Months Ended 3 Months Ended 12 Months Ended
Nov. 30, 2015
USD ($)
ft²
a
Dec. 31, 2021
USD ($)
Rate
Sep. 30, 2013
USD ($)
Oct. 31, 2020
UTAH | Building [Member]        
Area of Real Estate Property (Square Foot) | ft² 30,700      
UTAH | Land [Member]        
Area of Land (Acre) | a 3.6      
Payments to Acquire Property, Plant, and Equipment, Total $ 1,240,000      
Margin Account [Member]        
Proceeds from Issuance of Debt     $ 29,500,000  
Debt Instrument, Interest Rate, Effective Percentage (Rate) | Rate   0.75%    
Margin Account [Member] | Fed Funds Rate [Member]        
Debt Instrument, Basis Spread on Variable Rate     0.50%  
Real Estate Bank Loan Secured by Logan Office [Member]        
Loans Payable to Bank, Total $ 2,260,000 $ 1,540,000    
Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate 4.66%     3.33%
Long-term Debt, Term (Year)       10 years
Debt Instrument, Periodic Payment, Total   $ 16,600