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Other Assets - Additional Information (Details)	6 Months Ended
	Jun. 30, 2023 USD ($)
Other Assets [Abstract]
Amortization expense	$ 12,500

X

- Definition

Amortization of deferred financing fees.

+ References

No definition available.

+ Details

Name:	rand_AmortizationOfDeferredFinancingFees
Namespace Prefix:	rand_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- References

No definition available.

+ Details

Name:	us-gaap_OtherAssetsAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration