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Agreements Related to Intellectual Property (Details) - USD ($) $ in Thousands |  | 3 Months Ended
--- | --- | ---
Mar. 01, 2018 | Mar. 31, 2018
Agreements Related to Intellectual Property [Abstract] |  |
Payable amount for additional budgeted amounts |  | $ 108
Intellectual property change in budget amount | $ (444) |

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- References No definition available. + Details
Name: | rckt_AgreementsRelatedToIntellectualPropertyAbstract
Namespace Prefix: | rckt_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition The (decrease) during the reporting period in the intellectual property change in budget amount. + References No definition available. + Details
Name: | rckt_IntellectualPropertyChangeInBudgetAmount
Namespace Prefix: | rckt_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Payable amount for additional budgeted amount for the period from March 2018 through August 2018. + References No definition available. + Details
Name: | rckt_PayableForAdditionalBudgetedAmounts
Namespace Prefix: | rckt_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration