Statements of Changes in Net Assets - USD ($) $ in Thousands	3 Months Ended				12 Months Ended
	Jun. 30, 2023	Sep. 30, 2022	Jun. 30, 2022	Sep. 30, 2021	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2021
Increase (decrease) in net assets from operations:
Net investment loss	$ (829)	$ (549)	$ (778)	$ (1,561)	$ (2,816)	$ (5,357)	$ (4,039)
Net realized (loss) gain on investment in LTC	(51)	(357)	(123)	639	(746)	1,713	2,140
Net change in unrealized appreciation (depreciation) on investment in LTC	23,568	4,120	(112,716)	15,700	82,832	(140,651)	76,695
Net increase (decrease) in net assets resulting from operations					79,270	(144,295)	74,796
Increase in net assets from capital share transactions:
Shares issued					0	4,658	142,261
Net increase in net assets resulting from capital share transactions					0	4,658	142,261
Total increase (decrease) in net assets from operations and capital share transactions					79,270	(139,637)	217,057
Net assets:
Beginning of year		$ 79,397		$ 219,034	79,397	219,034	1,977
End of year	$ 158,667		$ 79,397		$ 158,667	$ 79,397	$ 219,034
Change in Shares outstanding:
Shares outstanding at beginning of year		17,204,700		16,812,000	17,204,700	16,812,000	509,400
Shares issued					0	392,700	16,302,600
Net increase in Shares					0	392,700	16,302,600
Shares outstanding at end of year	17,204,700		17,204,700		17,204,700	17,204,700	16,812,000