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Note 2 - Basis of Presentation and Use of Estimates and Significant Accounting Policies - Fair Value Measurements (Details) - USD ($)
Dec. 31, 2025
Dec. 31, 2024
Fair Value, Inputs, Level 1 [Member] | Fair Value, Recurring [Member]    
Cash and money market accounts(1) [1] $ 3,806,831  
Bank debt(2) [2] 0  
Fair Value, Inputs, Level 1 [Member] | Fair Value, Nonrecurring [Member]    
Cash and money market accounts(1) [1]   $ 3,758,232
Bank debt(2) [3]   0
Fair Value, Inputs, Level 2 [Member] | Fair Value, Recurring [Member]    
Cash and money market accounts(1) [1] 0  
Bank debt(2) [2] 8,457,433  
Fair Value, Inputs, Level 2 [Member] | Fair Value, Nonrecurring [Member]    
Cash and money market accounts(1) [1]   0
Bank debt(2) [3]   9,465,500
Fair Value, Inputs, Level 3 [Member] | Fair Value, Recurring [Member]    
Cash and money market accounts(1) [1] 3,806,831  
Bank debt(2) [2] $ 8,457,433  
Fair Value, Inputs, Level 3 [Member] | Fair Value, Nonrecurring [Member]    
Cash and money market accounts(1) [1]   3,758,232
Bank debt(2) [3]   $ 9,465,500
[1] Cash and cash equivalents are stated at nominal value, which equals fair value. A portion of our cash and cash equivalents is invested in money market accounts. The fair value of these investments is based on their closing published net asset value.
[2] Due to inflation and the changing interest rate environment, the carrying values of our fixed rate bank debt as of December 31, 2025 and 2024 differed from their fair market values. The amount outstanding under our bank debt facilities is measured at carrying value in our accompanying balance sheets.
[3] Due to inflation and the changing interest rate environment, the carrying values of our fixed rate bank debt as of December 31, 2025 and 2024 differed from their fair market values. The amount outstanding under our bank debt facilities is measured at carrying value in our accompanying balance sheets.