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Schedule of Investments were Classified as Level 1 Trading Securities (Details) (Parenthetical) $ in Millions	3 Months Ended
	Mar. 31, 2023 USD ($)
Investments, Debt and Equity Securities [Abstract]
Treasury bill	$ 3

X

- Definition

Investment treasury bill.

+ References

No definition available.

+ Details

Name:	REFR_InvestmentTreasuryBill
Namespace Prefix:	REFR_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- References

No definition available.

+ Details

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