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Note 1 - Organization and Significant Accounting Policies (Details Textual) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Jun. 30, 2023
Jun. 30, 2022
Jul. 25, 2023
Dec. 31, 2022
Cash and Cash Equivalents, at Carrying Value $ 1,900,723   $ 1,900,723     $ 1,787,248
Net Working Capital 2,052,199   2,052,199      
Net Cash Provided by (Used in) Operating Activities     79,502 $ 427,973    
Operating Income (Loss) (67,370) $ 159,089 (486,898) $ 99,535    
Retained Earnings (Accumulated Deficit) (69,908,158)   $ (69,908,158)     (69,670,404)
Number of Reportable Segments     6      
Accounts Receivable, after Allowance for Credit Loss, Current 217,174   $ 217,174     169,074
Contract with Customer, Liability 12,475   12,475     13,020
Contract with Customer, Liability, Revenue Recognized     $ 13,020      
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares)     6,400      
Financing Receivable, after Allowance for Credit Loss, Current $ 1,854,167   $ 1,854,167     $ 1,604,167
Embolx [Member] | Subsequent Event [Member]            
Note Receivable, Increase in Face Value, Percentage         20.00%  
Note Receivable, Over Allotment Option         $ 500,000  
Note Receivable, Purchase Discount         25.00%  
Notes Receivable, Liquidation Preference on Face Value         2.75  
CANADA            
Property and Equipment Net Percentages 100.00%   100.00%      
CANADA | Revenue from Contract with Customer Benchmark [Member] | Customer Concentration Risk [Member]            
Concentration Risk, Percentage 99.00%   99.00%      
UNITED STATES | Revenue from Contract with Customer Benchmark [Member] | Customer Concentration Risk [Member]            
Concentration Risk, Percentage 1.00%   1.00%