Net Change in Assets and Liabilities - Details of Change in Carrying Value of Assets and Liabilities, Net (Details) - USD ($) $ in Thousands	3 Months Ended			9 Months Ended
	Mar. 31, 2025	Sep. 30, 2024	Mar. 31, 2024	Mar. 31, 2025	Mar. 31, 2024
Restricted for Qualifying Victims [Member]
Distributions Made [Line Items]
Restricted cash	$ (11)	$ 701	$ 595	$ 34
Other assets	0		46	(58)	$ (25)
Total assets	(11)		641	(24)	676
Accounts payable and accrued liabilities	6			6
Accrued liquidation costs	(17)		(6)	(73)	(21)
Total liabilities	(11)		(6)	(67)	(21)
Change in carrying value of assets and liabilities, net	0		0	0	0
Change in carrying value of assets and liabilities, net	0		647	43	697
Restricted for Qualifying Victims [Member] | Cash Activities [Member]
Distributions Made [Line Items]
Restricted cash	(11)	$ 701	595	34
Other assets	0		(38)	(91)	(146)
Total assets	(11)		557	(57)	555
Accounts payable and accrued liabilities	0			0
Accrued liquidation costs	(11)		(6)	(58)	(21)
Total liabilities	(11)		(6)	(58)	(21)
Change in carrying value of assets and liabilities, net	0		563	1	576
Restricted for Qualifying Victims [Member] | Remeasurement [Member]
Distributions Made [Line Items]
Restricted cash	0		0	0
Other assets	0		84	33	121
Total assets	0		84	33	121
Accounts payable and accrued liabilities	6			6
Accrued liquidation costs	(6)		0	(15)	0
Total liabilities	0		0	(9)	0
Change in carrying value of assets and liabilities, net	0		84	42	121
All Interestholders [Member]
Distributions Made [Line Items]
Restricted cash	(1)		(1)	(1)	8
Other assets	(4,491)		597	7	(262)
Total assets	(1,358)		2,382	4,652	31,474
Accounts payable and accrued liabilities	(44)		(14)	9	(17)
Accrued liquidation costs	(872)		(2,007)	(2,745)	(5,535)
Total liabilities	(916)		(2,021)	(2,736)	(5,552)
Change in carrying value of assets and liabilities, net	(442)		4,403	7,388	37,026
Change in carrying value of assets and liabilities, net	0		0	0	0
Cash, cash equivalents and short-term investments	3,134		1,786	4,646	31,728
All Interestholders [Member] | Cash Activities [Member]
Distributions Made [Line Items]
Restricted cash	(1)		(1)	(1)	8
Other assets	(4,838)		(3,963)	(9,655)	(39,948)
Total assets	(1,705)		(2,178)	(5,010)	(8,212)
Accounts payable and accrued liabilities	(49)		(260)	(310)	(2,752)
Accrued liquidation costs	(1,708)		(1,920)	(5,434)	(5,479)
Total liabilities	(1,757)		(2,180)	(5,744)	(8,231)
Change in carrying value of assets and liabilities, net	52		2	734	19
Cash, cash equivalents and short-term investments	3,134		1,786	4,646	31,728
All Interestholders [Member] | Remeasurement [Member]
Distributions Made [Line Items]
Restricted cash	0		0	0	0
Other assets	347		4,560	9,662	39,686
Total assets	347		4,560	9,662	39,686
Accounts payable and accrued liabilities	5		246	319	2,735
Accrued liquidation costs	836		(87)	2,689	(56)
Total liabilities	841		159	3,008	2,679
Change in carrying value of assets and liabilities, net	(494)		4,401	6,654	37,007
Cash, cash equivalents and short-term investments	$ 0		$ 0	$ 0	$ 0