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Note 3 - Procurement Contracts and Research Agreements (Details Textual)				3 Months Ended				12 Months Ended	55 Months Ended	67 Months Ended
	Sep. 28, 2022 USD ($)	May 12, 2022 USD ($)	Sep. 10, 2018 USD ($)	Mar. 31, 2024 USD ($)	Mar. 31, 2023 USD ($)	Sep. 30, 2022 USD ($)	Jun. 30, 2022 USD ($)	Dec. 31, 2022 USD ($)	Mar. 31, 2024 USD ($)	Mar. 31, 2024 USD ($)	Feb. 29, 2024 USD ($)	Oct. 31, 2023	Dec. 31, 2021 USD ($)	Jul. 31, 2019 USD ($)
Contract with Customer, Liability, Revenue Recognized				$ 500,000
The 19C BARDA Contract [Member]
Number of Courses to Be Delivered			1,488,000									106,000
Number of Vials in a Course			14									28
Government Contract, Value of Award				602,500,000					$ 602,500,000	$ 602,500,000
Government Contract, Base Period, Value of Award for Delivery and Support Activities			$ 51,700,000	51,700,000					51,700,000	51,700,000
Government Contract Value Related To Exercised Options										407,100,000
Government Contract, Value, Payments Currently Specified as Unexercised Options				143,700,000						143,700,000
Base Period of Performance, Exercise of Options, Term (Year)			10 years
Government Contract, Base Period, Value of Award for Delivery and Support Activities, Delivery of Courses			$ 11,100,000
Government Contract, Base Period, Number of Deliveries			35,700
Government Contract, Base Period, Value of Award for Delivery and Support Activities, Manufacture of Courses			$ 8,000,000
Government Contract, Base Period, Value of Award for Delivery and Support Activities, Advanced Development			32,000,000
Government Contract, Base Period, Value of Award for Delivery and Support Activities, Supportive Procurement Activities			600,000
Proceeds from Delivery of Courses										$ 11,100,000
Number of Courses Delivered										35,700
Proceeds from Other Base Period Activities										$ 23
Government Contract, Value, Payments Remaining Related to Exercised Options										407,100,000
Government Contract, Value of Unexercised Options, Supportive Procurement Activities				5,600,000					5,600,000	5,600,000
The 19C BARDA Contract [Member] | Transferred over Time [Member]
Contract with Customer, Liability, Revenue Recognized				1,600,000	$ 1,600,000
The 19C BARDA Contract [Member] | Transferred at Point in Time [Member]
Contract with Customer, Liability, Revenue Recognized				14,700,000	0
The 19C BARDA Contract [Member] | IV TPOXX [Member]
Number of Courses to Be Delivered												10,000
Government Contract, Value, Payments Related to Exercised Options, Funding of Post-Marketing Activities				3,600,000					3,600,000	3,600,000
Government Contract, Value, Payments Related to Unexercised Options, Delivery of Courses				112,500,000					112,500,000	112,500,000
Government Contract, Value, Payments Related to Unexercised Options, Funding of Post-Marketing Activities				$ 10,200,000					$ 10,200,000	$ 10,200,000
Number of Manufacturing Steps				2					2	2
The 19C BARDA Contract [Member] | IV BDS [Member]
Government Contract, Base Period, Value of Award for Delivery and Support Activities, Manufacture of Courses			$ 3,200,000
Proceeds from the Manufacture of Courses										$ 3,200,000
Proceeds from the Delivery of Courses										4,300,000
Contract with Customer, Liability, Total				$ 20,500,000					$ 20,500,000	$ 20,500,000			$ 3,200,000
Government Contract, Number of Options for Manufacture of Product				3					3	3
Government Contract, Courses Manufactured Upon Exercise of Options				32,000					32,000	32,000
The 19C BARDA Contract [Member] | IV FDP Containing IV BDS [Member]
Contract with Customer, Liability, Total				$ 20,500,000				$ 300,000	$ 20,500,000	$ 20,500,000
Contract with Customer, Liability, Revenue Recognized								$ 2,900,000
Government Contract, Value, Payments Currently Specified as Unexercised Options, Manufacture of Courses				$ 51,200,000					$ 51,200,000	$ 51,200,000
The 19C BARDA Contract [Member] | Oral TPOXX [Member]
Number of Courses to Be Delivered				1,100,000					1,100,000	1,100,000
Government Contract, Value, Payments Related to Exercised Options, Delivery of Courses				$ 337,700,000					$ 337,700,000	$ 337,700,000
Government Contract, Value, Payments Related to Exercised Options, Funding of Post-Marketing Activities				14,600,000					14,600,000	14,600,000
Government Contract, Total Amount of Exercised Options, Delivery of Materials				15,000,000					337,700,000
Proceeds from Payments Received for Post-marketing Activities				8,200,000
The 19C BARDA Contract [Member] | IV FDP [Member]
Government Contract, Value, Payments Currently Specified as Unexercised Options, Manufacture of Courses				$ 25,600,000					$ 25,600,000	$ 25,600,000
Government Contract, Number of Options for Manufacture of Product				3					3	3
Government Contract, Courses Manufactured Upon Exercise of Options				32,000					32,000	32,000
The 19C BARDA Contract [Member] | Maximum [Member]
Number of Courses to Be Delivered			212,000
IC BARDA [Member] | Transferred over Time [Member]
Government Contract, Value, Payments Currently Specified as Unexercised Options, Manufacture of Courses				$ 10,200,000					$ 10,200,000	$ 10,200,000
Government Contract, Value, Payments Related to Unexercised Options, Funding of Post-Marketing Activities				25,600,000					25,600,000	25,600,000
U.S. Department of Defense (“DoD”) [Member] | Oral TPOXX [Member]
Government Contract, Value, Payments Currently Specified as Unexercised Options	$ 5,500,000	$ 3,800,000
Contract with Customer, Liability, Revenue Recognized					5,100,000		$ 3,600,000
Government Contract, Value Ordered	$ 5,100,000	$ 3,600,000									$ 1,000,000
Government Contract, Value, Option Exercised					5,500,000	$ 3,800,000
International Procurement [Member] | Oral TPOXX [Member]
Government Contract, Value of Award				18,000,000					18,000,000	18,000,000
Government Contract, Value, Payments Currently Specified as Unexercised Options				6,700,000
Government Contract, Delivery of Material				7,000,000					7,000,000	7,000,000
International Procurement [Member] | Oral TPOXX [Member] | Scenario, Plan [Member]
Government Contract, Value of Award				14,000,000					14,000,000	14,000,000
International Procurement [Member] | Oral TPOXX [Member] | Transferred at Point in Time [Member]
Contract with Customer, Liability, Revenue Recognized				8,000,000	0
Canadian Contract [Member] | Meridian Medical Technologies [Member]
Government Contract, Delivery of Material				700,000					$ 700,000	$ 700,000
The PEP Label Expansion R & D Contract with the Department of Defense [Member]
Government Contract, Increased Value of Award														$ 27,000,000
The PEP Label Expansion R & D Contract with the Department of Defense [Member] | Transferred over Time [Member]
Contract with Customer, Liability, Revenue Recognized				$ 0	$ 1,400,000

X

- Definition

The length of the base period of performance for a contract excluding extensions, and other modifications, in which options granted in the contract may be exercised.

+ References

No definition available.

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No definition available.

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- Definition

The value of the award for delivery and support activities under the government contract during the base period.

+ References

No definition available.

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- Definition

The value of award for the advanced funding for new product portion of the government contract for delivery and support activities during the base period of the contract.

+ References

No definition available.

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- Definition

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+ References

No definition available.

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- Definition

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+ References

No definition available.

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- Definition

The value of award for the supportive procurement activities portion of the government contract for delivery and support activities during the base period of the contract.

+ References

No definition available.

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- Definition

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+ References

No definition available.

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- Definition

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No definition available.

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- Definition

increased value of base contract award for a government contract.

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No definition available.

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- Definition

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+ References

No definition available.

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- Definition

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+ References

No definition available.

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+ References

No definition available.

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- Definition

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+ References

No definition available.

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- Definition

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+ References

No definition available.

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Value ordered for government contract.

+ References

No definition available.

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- Definition

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+ References

No definition available.

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- Definition

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+ References

No definition available.

+ Details

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- Definition

The value of payments related to exercised options under the government contract to be used for the delivery of courses.

+ References

No definition available.

+ Details

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- Definition

The value of payments related to exercised options under the government contract to be used for funding of post-marketing activities.

+ References

No definition available.

+ Details

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- Definition

Represents payments for delivery of courses related to unexercised options for government contract.

+ References

No definition available.

+ Details

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- Definition

The value of payments to be received related to unexercised options under the government contract to be used for funding of post-marketing activities.

+ References

No definition available.

+ Details

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- Definition

Represents the value of payments to be received from a government contract related to the exercise of options.

+ References

No definition available.

+ Details

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- Definition

Represents government contract value related to exercised options.

+ References

No definition available.

+ Details

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- Definition

The number of courses delivered during the period.

+ References

No definition available.

+ Details

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- Definition

The number of courses to be delivered.

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No definition available.

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- Definition

The number of steps in the manufacturing process of a product.

+ References

No definition available.

+ Details

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- Definition

The number of vials in a course.

+ References

No definition available.

+ Details

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- Definition

The cash inflow due to successful delivery of courses.

+ References

No definition available.

+ Details

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- Definition

The cash inflow during the period for activities classified as other during the base period of the contract.

+ References

No definition available.

+ Details

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- Definition

The cash inflow from payments received for post-marketing activities.

+ References

No definition available.

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- Definition

The cash inflow during the period from the delivery of courses.

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No definition available.

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- Definition

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No definition available.

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- Definition

Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
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