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Investments (Summary of Held-to-Maturity Debt Securities by Contractual Maturity) (Details)
Mar. 31, 2023
USD ($)
Amortized cost basis  
Due within one year $ 12,045,520
Due after one year through five years 4,949,470
Amortized cost basis 16,994,990
Fair Value  
Due within one year 12,032,385
Due after one year through five years 4,943,741
Fair Value $ 16,976,126