Quarterly report pursuant to Section 13 or 15(d)

Investments in Debt and Equity Securities (Narrative) (Details)

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Investments in Debt and Equity Securities (Narrative) (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Dec. 31, 2021
Dec. 31, 2021
Dec. 31, 2020
Jun. 30, 2021
Amortization of premiums on debt securities $ 93 $ 195 $ 50  
Investments in equity security - at cost $ 1,760 $ 1,760   $ 0
Minimum [Member]        
Debt securities, interest rate 0.22% 0.22%    
Debt securities, maturity date Jan. 01, 2022 Jan. 01, 2022    
Maximum [Member]        
Debt securities, interest rate 3.50% 3.50%    
Debt securities, maturity date Nov. 01, 2023 Nov. 01, 2023