Note 1 - Organization and Summary of Significant Accounting Policies - Research and Development Costs (Details) - USD ($)	3 Months Ended	6 Months Ended
Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Outside contracted services	$ 2,036,753	$ 970,846	$ 3,695,947	$ 1,584,636
Personnel related costs	149,587	139,515	297,749	263,153
Facilities, overhead and other	22,902	5,802	23,644	23,827
Research And Development Expense, Including Related Party	$ 2,209,242	$ 1,116,163	$ 4,017,340	$ 1,871,616

Represents facilities, overhead and other for research and development expense.

No definition available.

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration