Debt - Collateral and Guarantors (Details)	12 Months Ended
Dec. 31, 2021
Debt
Capital stock of the first-tier foreign subsidiaries pledged (as a percent)	65.00%

Represents the percentage of capital stock of the first-tier foreign subsidiaries pledged.

No definition available.

Name:	rdbx_PercentageOfCapitalStockOfFirstTierForeignSubsidiariesPledged
Namespace Prefix:	rdbx_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration