Preferred Stock - Schedule of Preferred Stock (Details) - USD ($) $ / shares in Units, $ in Thousands	Oct. 02, 2017	Dec. 31, 2020	Jun. 30, 2020
Equity [Abstract]
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	$ 15
Liquidation preference		$ 16,463	$ 16,178
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	$ 15
Liquidation preference		$ 16,463	$ 16,178
Preferred Class A [Member]
Equity [Abstract]
Preferred Stock, Shares Authorized (in shares)	21,000	21,000	21,000
Preferred stock, issued (in shares)	14,700
Preferred stock, par value (in US$ per share)	$ 1,120
Preferred Stock, Value, Issued	$ 16,463
Preferred Stock, Amount of Preferred Dividends in Arrears	1,763
Liquidation preference	$ 16,463
Auction Market Preferred Securities, Stock Series [Line Items]
Preferred Stock, Shares Authorized (in shares)	21,000	21,000	21,000
Preferred stock, issued (in shares)	14,700
Preferred stock, par value (in US$ per share)	$ 1,120
Preferred Stock, Value, Issued	$ 16,463
Preferred Stock, Amount of Preferred Dividends in Arrears	1,763
Liquidation preference	$ 16,463