Represents the aggregate revenue maximum for companies to to be eligible to receive a cash refund for research and development costs.

No definition available.

Name:	zyne_AggregateRevenueMaximumForResearchAndDevelopmentCostsCashRefund
Namespace Prefix:	zyne_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Represents the estimated cash refund from Goods and Services Taxes paid as of the balance sheet date.

No definition available.

Name:	zyne_EstimatedCashRefundGoodsAndServicesTaxPaid
Namespace Prefix:	zyne_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

No definition available.

Name:	zyne_IncentiveAndTaxReceivableAbstract
Namespace Prefix:	zyne_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

The amount of cash inflow from non Advance Overseas Funding related to research and development incentive.

No definition available.

Name:	zyne_ProceedsFromNonAdvanceOverseasFundingResearchAndDevelopmentIncentive
Namespace Prefix:	zyne_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

The amount of research and development incentive tax credit during the period.

No definition available.

Name:	zyne_ResearchAndDevelopmentIncentiveAndTaxCredit
Namespace Prefix:	zyne_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

The carrying amount as of the balance sheet date of research and development incentive and tax receivable.

No definition available.

Name:	zyne_ResearchAndDevelopmentIncentiveAndTaxReceivable
Namespace Prefix:	zyne_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Name:	us-gaap_IncomeTaxAuthorityNameAxis=us-gaap_AustralianTaxationOfficeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_BalanceSheetLocationAxis=zyne_IncentiveAndTaxReceivablesCurrentCaptionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Summary of Significant Accounting Policies - Incentive and Tax Receivable (Details) - Australian Taxation Office - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2022	Dec. 31, 2019	Sep. 30, 2022
Incentive and Tax Receivable
Aggregate revenue maximum to be eligible to receive a cash refund			$ 20.0
Research and development incentive and tax receivable		$ 8.3
Research and development incentive tax credit		$ 8.3
Research and development incentive	$ 8.0
Incentive And Tax Receivables Current
Incentive and Tax Receivable
Estimated GST receivable			$ 0.3