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Note 3 - Net Investment in Sales Type Lease (Details Textual) - USD ($)
1 Months Ended 12 Months Ended
Jan. 31, 2021
Dec. 31, 2023
Dec. 31, 2022
Sales-Type Lease, Net Investment in Lease, after Allowance for Credit Loss, Current   $ 64,310 $ 59,173
Sales-Type Lease, Net Investment in Lease, after Allowance for Credit Loss, Noncurrent   113,621 176,444
January 2021 [Member]      
Lessor, Sales-type Lease, Term of Contract (Year) 5 years    
Lessor, Sales-type Lease, Implied Interest Rate 6.00%    
Sales-Type Lease, Net Investment in Lease, after Allowance for Credit Loss $ 210,782    
Inventory Derecognized for Sales-type Leases $ 139,521    
Sales-type Lease, Lease Income   41,797 39,369
Sales-type Lease, Interest Income   7,103 $ 9,531
December 2022 [Member]      
Lessor, Sales-type Lease, Term of Contract (Year)     5 years
Lessor, Sales-type Lease, Implied Interest Rate     6.00%
Sales-Type Lease, Net Investment in Lease, after Allowance for Credit Loss     $ 98,279
Inventory Derecognized for Sales-type Leases     46,533
Sales-type Lease, Lease Income   15,588 51,746
Sales-type Lease, Interest Income   $ 5,012 $ 11,673