Stockholders' Equity - Stock Options - Additional Information (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2022	Mar. 31, 2021
Stockholders' Equity
Stock-based compensation	[1]	$ 578	$ 616	$ 2,572	$ 1,330
Restricted Stock Awards and Stock Options
Stockholders' Equity
Stock-based compensation		500	$ 600	2,200	$ 1,300
Total unrecognized compensation cost		1,700		1,700
GECC Common Shares
Stockholders' Equity
Stock issued during period, value				900
Stock issued during period value vested immediately				$ 200
Number of years issued shares vest annually on pro-rata basis				3 years
GECC Common Shares | Employees
Stockholders' Equity
Stock-based compensation		$ 70		$ 400

[1] Non-cash compensation includes stock-based compensation and compensation in the form of stock in portfolio companies held by the Company. Non-cash compensation attributable to the investment management segment is included in investment management expenses in the condensed consolidated statements of operations. Non-cash compensation attributable to the general corporate segment is included in selling, general and administrative expense in the condensed consolidated statements of operations.