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Income taxes (Details)	12 Months Ended
	Mar. 31, 2024 USD ($)
Income taxes [Line Items]
Net operating loss carryforwards federal income tax	$ 35,000,000
Net operating loss carryforwards state income tax	50,400,000
Federal research and development tax credit	2,100,000
State research and development credits	$ 500,000

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 944
-SubTopic 30
-Name Accounting Standards Codification
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Amount, before allocation of valuation allowance, of deferred tax asset attributable to deductible temporary difference from in-process research and development cost acquired in business combination or from joint venture formation or both.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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Amount of current and deferred federal, state, and local tax expense (benefit) attributable to income (loss) from continuing operations. Includes, but is not limited to, current and deferred national, regional, territorial, and provincial tax expense (benefit) for non-US (United States of America) jurisdiction.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 740
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-Section S99
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Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws.

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The net amount of research and development costs incurred for a fixed-price, best-efforts research and development cost-sharing arrangement with the Federal Government.

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