Debt - First lien term loan (Details) $ in Thousands	Dec. 31, 2018 USD ($)
Debt
Maximum dividends payments	$ 1,030

The amount of maximum dividends payments as per credit agreement covenants.

No definition available.

Name:	rdbx_CreditAgreementCovenantsMaximumDividendsPayments
Namespace Prefix:	rdbx_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant