XML 65 R55.htm IDEA: XBRL DOCUMENT
v3.25.0.1

Senior Secured Revolving Credit Facility - Summary of Information about Corporation's Senior Securities (Parenthetical) (Details) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Line of Credit Facility [Abstract] |  |  |
Asset coverage ratio per unit of indebtedness | $ 1,000 | $ 1,000 | $ 1,000

X
- Definition Asset coverage ratio per unit of indebtedness. + References No definition available. + Details
Name: | rand_AssetCoverageRatioPerUnitOfIndebtedness
Namespace Prefix: | rand_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_LineOfCreditFacilityAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration