Note 4 - Accrued Expenses (Tables)

3 Months Ended

12 Months Ended

Mar. 31, 2022

Dec. 31, 2021

Notes Tables

Schedule of Accrued Liabilities [Table Text Block]

	March 31, 2022		December 31, 2021
Accrued license fees – current	$	3,000,000	$	3,000,000
Accrued license fees – noncurrent		2,000,000		2,000,000
Accrued payroll		-		269,000
Other accrued expenses		75,000		108,826
Total accrued expenses	$	5,075,000	$	5,377,826

	2021		2020
Accrued license fees – current	$	3,000,000	$	-
Accrued license fees – noncurrent		2,000,000		-
Accrued payroll		269,000		279,696
Other accrued expenses		108,826		79,585
Total accrued expenses	$	5,377,826	$	359,281