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Investment
 6 Months Ended
Dec. 31, 2022
Investment  
Investment 2.    INVESTMENTS

The following table summarizes the unrealized positions for the held-to-maturity debt securities as of December 31, 2022:

Amortized cost basis

Gross unrealized gains

Gross unrealized losses

Fair Value

US treasury securities

$

14,901,161

$

—

$

38,950

$

14,862,211

Total

$

14,901,161

$

—

$

38,950

$

14,862,211

The following table summarizes the fair value and amortized cost basis of the held-to-maturity debt securities by contractual maturity as of December 31, 2022:

Amortized Cost Basis

Fair value

Due within one year

$

5,010,628

$

5,003,216

Due after one year through five years

9,890,533

9,858,995

Total

$

14,901,161

$

14,862,211