Quarterly report pursuant to Section 13 or 15(d)

Marketable securities (Details 1)

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Marketable securities (Details 1) - USD ($)
Mar. 31, 2024
Dec. 31, 2023
Debt Securities, Held-to-Maturity, Allowance for Credit Loss [Line Items]    
Total marketable securities $ 982,604 $ 4,462,942
Fair Value, Inputs, Level 1 [Member]    
Debt Securities, Held-to-Maturity, Allowance for Credit Loss [Line Items]    
Total marketable securities 0 0
Fair Value, Inputs, Level 2 [Member]    
Debt Securities, Held-to-Maturity, Allowance for Credit Loss [Line Items]    
Total marketable securities 982,604 4,462,942
Fair Value, Inputs, Level 3 [Member]    
Debt Securities, Held-to-Maturity, Allowance for Credit Loss [Line Items]    
Total marketable securities 0 0
Corporate Debt Securities [Member]    
Debt Securities, Held-to-Maturity, Allowance for Credit Loss [Line Items]    
Total marketable securities 982,604 4,462,942
Corporate Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member]    
Debt Securities, Held-to-Maturity, Allowance for Credit Loss [Line Items]    
Total marketable securities 0 0
Corporate Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member]    
Debt Securities, Held-to-Maturity, Allowance for Credit Loss [Line Items]    
Total marketable securities 982,604 4,462,942
Corporate Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member]    
Debt Securities, Held-to-Maturity, Allowance for Credit Loss [Line Items]    
Total marketable securities $ 0 $ 0