Common Stock, Preferred Stock and Dividends - Common Stock (Details)	12 Months Ended
	Jun. 30, 2022 Vote
Common stock
BFI ownership percentage at which the remaining Class B shares would convert to Class A	15.00%
Common Class A
Common stock
Common stock, voting rights	Holders of our Class A common stock are entitled to one vote for each share held of record on all matters submitted to a vote of stockholders.
Common stock, voting rights, votes per share	1
Common Class B
Common stock
Common stock, voting rights	Holders of our Class B common stock are entitled to 10 votes for each share held of record on all matters submitted to a vote of stockholders.
Common stock, voting rights, votes per share	10