Name:	btx_AmountRequireToPayInitialLicenseFees
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Initial license fees required to pay including non-refundable fee.

No definition available.

No definition available.

Name:	btx_LicensingAgreementsAbstract
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The amount of Non-refundable option fee in licensing agreement.

No definition available.

Name:	btx_LossContingencyNonRefundableOptionFee
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Percentage of royalty payable from one party to another in licensing agreement.

No definition available.

Name:	btx_LossContingencyPercentageOfRoyaltyPayable
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Namespace Prefix:
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COMMITMENTS AND CONTINGENCIES, Licensing Agreements (Details) - USD ($)				6 Months Ended
	Apr. 30, 2021	Apr. 15, 2021	Apr. 13, 2021	Jun. 30, 2021	Oct. 31, 2022	Oct. 31, 2021	Apr. 26, 2021
Licensors [Member]
Licensing Agreements [Abstract]
Non-refundable option fee			$ 500,000
Initial license fees	$ 4,000,000
Amount require to pay of initial license fees		$ 1,000,000
Amount obligated to pay in license agreement							$ 4,000,000.0
Licensors [Member] \| Forecast [Member]
Licensing Agreements [Abstract]
Additional fees obligated to pay in 2021						$ 5,000,000
Additional fees obligated to pay in 2022					$ 7,000,000
University of South Florida [Member]
Licensing Agreements [Abstract]
Percentage of royalty payable				7.00%