Preferred Stock - Schedule of Preferred Stock (Details) - USD ($)	9 Months Ended
	Mar. 31, 2022	Jun. 30, 2021	Oct. 02, 2017
Auction Market Preferred Securities, Stock Series [Line Items]
Preferred Stock, Shares Authorized (in shares)	500,000	500,000
Preferred stock, issued (in shares)	14,700	14,700
Preferred stock, par value (in US$ per share)	$ 1.00	$ 1.00
Preferred Stock, Value, Issued	$ 15,000	$ 15,000
Liquidation preference	$ 17,196,000	$ 16,752,000
Preferred Class A [Member]
Auction Market Preferred Securities, Stock Series [Line Items]
Preferred Stock, Shares Authorized (in shares)	21,000	21,000
Preferred stock, issued (in shares)	14,700		14,700
Preferred stock, par value (in US$ per share)	$ 1,170
Preferred Stock, Value, Issued	$ 17,196,000
Dividends, Preferred Stock, Stock	2,496,000
Liquidation preference	$ 17,196,000