Note B - Summary of Significant Accounting Policies (Details Textual) - USD ($) $ in Thousands		3 Months Ended			9 Months Ended
	Sep. 03, 2019	Sep. 30, 2020	Jun. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Jul. 31, 2020	May 31, 2020	Dec. 31, 2019
Revenue from Contract with Customer, Including Assessed Tax		$ 1,925		$ 11,463	$ 10,922	$ 11,463
Accounts Receivable, Allowance for Credit Loss, Ending Balance		0			0				$ 0
License [Member]
Accounts Receivable, after Allowance for Credit Loss, Current, Total		0			0				1,600
Consulting Services [Member]
Revenue from Contract with Customer, Including Assessed Tax		0		0	1,700	0
Deferred Revenue, Total		0			0				0
Accounts Receivable, after Allowance for Credit Loss, Current, Total		0			0				100
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
Regulatory Milestone Revenue to Be Earned Following FDA Acceptance	5,000							$ 5,000
Revenue Recognition, Milestone Method, Additional Revenue to be Recognized	$ 420,000
Contract with Customer, Liability, Revenue Recognized			$ 5,000
Capitalized Contract Cost, Gross		2,800			2,800
Deferred Revenue, Total		0			0				0
GPC Member | License [Member] | Royalty and Direct Contract Acquisition Costs [Member]
Capitalized Contract Cost, Amortization		0			800
Corium, Inc [Member] | Consulting Services [Member]
Revenue from Contract with Customer, Including Assessed Tax		1,900		$ 0	1,900	$ 0
Deferred Revenue, Total		100			100				$ 0
Consulting Agreement, Maximum Amount to be Received							$ 15,600
Contract with Customer, Asset, after Allowance for Credit Loss, Total							13,600
Consulting Agreement, Conditional Milestone Achievement to be Received							$ 2,000
Percentage of Consulting Services and Out-of-pocket Third-party Research and Development Costs Recognized							15.00%
Accounts Receivable, after Allowance for Credit Loss, Current, Total		$ 2,000			$ 2,000