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Note 15 - Share Based Awards (Details Narrative) - USD ($) | 6 Months Ended | 12 Months Ended
--- | --- | ---
Oct. 31, 2021 | Apr. 30, 2021
Share-based Payment Arrangement [Abstract] |  |
[custom:NumberOfSharesIssuableInConnectionWithAwardsUnderPlanMaximum] | 8,750,000 |
[custom:UnrecognizedStockbasedCompensationExpenseRelatedToUnvestedStockOptionsNetOfEstimatedForfeitures] | $ 2,636,693 | $ 914,915

X
- References No definition available. + Details
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Namespace Prefix: | RCAT_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | RCAT_UnrecognizedStockbasedCompensationExpenseRelatedToUnvestedStockOptionsNetOfEstimatedForfeitures
Namespace Prefix: | RCAT_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration