Note 3 - Balance Sheet Components (Tables)

9 Months Ended

Sep. 30, 2023

Notes Tables

Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Table Text Block]

	September 30, 2023		December 31, 2022
Prepaid clinical trial costs (current portion)	$	1,986,037	$	1,171,077
Prepaid insurance premiums		-		107,876
Prepaid rent		13,045		13,045
Other prepaid expenses		114,167		34,000
Total prepaid expenses	$	2,113,249	$	1,325,998

Property, Plant and Equipment [Table Text Block]

	September 30, 2023			December 31, 2022
Equipment and furnishings	$	755,809		$	725,812
Leasehold improvements		115,605			115,605
Total property and equipment		871,414			841,417
Accumulated depreciation and amortization		(658,461	)		(606,505	)
Total property and equipment, net	$	212,953		$	234,912

Schedule of Other Assets [Table Text Block]

	September 30, 2023		December 31, 2022
Prepaid clinical trial costs (noncurrent portion)	$	1,106,778	$	2,083,276
Prepaid technology license fees		70,000		80,000
Deposits		11,010		11,010
Total other assets	$	1,187,788	$	2,174,286

Schedule of Accrued Liabilities [Table Text Block]

	September 30, 2023		December 31, 2022
Accrued technology license fees	$	2,000,000	$	2,000,000
Payroll-related liabilities		133,665		550,810
Other accrued expenses		734,725		449,402
Total accrued expenses	$	2,868,390	$	3,000,212