Note A - Description of Business and Basis of Presentation (Details Textual) - USD ($) $ in Thousands				1 Months Ended			3 Months Ended		9 Months Ended		12 Months Ended
	Apr. 23, 2020	Sep. 03, 2019	Feb. 28, 2019	May 31, 2020	Feb. 29, 2020	Oct. 31, 2018	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Feb. 29, 2020
Proceeds from Issuance of Long-term Debt, Total									$ 781
Revenue from Contract with Customer, Including Assessed Tax							$ 1,925	$ 11,463	$ 10,922	11,463
Lincoln Park [Member]
Sale of Securities, Value, Available to Issue			$ 15,000		$ 4,000						$ 4,000
Purchase Agreement, Term (Month)			3 years		1 year
Purchase Agreement, Additional Shares to Be Issued as Commitment Shares (in shares)			120,200	308,637	308,637				308,637
Stock Issued During Period, Shares, New Issues (in shares)									8,959,545		3,401,271
Proceeds from Issuance of Common Stock									$ 2,300		$ 5,400
Purchase Agreement, Maximum Shares to be Issued (in shares)				9,268,182
KVK [Member]
License Agreement, Estimated Pre-launch Payments and Costs Reimbursements						$ 3,400
License Agreement, Pre-launch Payment Reimbursement Within 10 Days of Initial Adoption Milestone						2,000
License Agreement, Maximum Payments Received for Sales Milestones						$ 53,000
KVK [Member] | Minimum [Member]
License Agreement, Percentage of Net Sales on Rolling Four Quarter Basis Received						30.00%
KVK [Member] | Maximum [Member]
License Agreement, Percentage of Net Sales on Rolling Four Quarter Basis Received						50.00%
GPC Member | License [Member]
Revenue from Contract with Customer, Including Assessed Tax		$ 10,000					$ 0	$ 11,500	$ 7,300	$ 1,000
Revenue Recognition, Milestone Method, Revenue to be Recognized		63,000
Revenue Recognition, Milestone Method, Additional Revenue to be Recognized		420,000
Regulatory Milestone Revenue to Be Earned Following FDA Acceptance		$ 5,000		$ 5,000
Royalty Revenue, Percent		10.00%
Paycheck Protection Program CARES Act [Member]
Proceeds from Issuance of Long-term Debt, Total	$ 800