STATEMENTS OF ASSETS AND LIABILITIES (UNAUDITED) (Parenthetical) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
Jun. 30, 2022	Sep. 30, 2021
Statement of Financial Position [Abstract]
Cost of investment in Lumens, at fair value	$ 19,067	$ 19,427
Common shares authorized	Unlimited	Unlimited
Stock, par value	$ 0	$ 0

Indicates that the number of common shares permitted to be issued by an entity's charter and bylaws is unlimited. The acceptable value is "Unlimited".

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.29)
-URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

Name:	us-gaap_CommonStockSharesAuthorizedUnlimited
Namespace Prefix:	us-gaap_
Data Type:	us-types:authorizedUnlimitedItemType
Balance Type:	na
Period Type:	duration