Annual report pursuant to Section 13 and 15(d)

Note 2 - Summary of Significant Accounting Policies - Estimated Useful Lives of Intangible Assets (Details)

v3.20.2
Note 2 - Summary of Significant Accounting Policies - Estimated Useful Lives of Intangible Assets (Details)
12 Months Ended
Mar. 31, 2020
Patents [Member]  
Patents (Year) 20 years
Licensing Agreements [Member] | Minimum [Member]  
Patents (Year) 8 years
Licensing Agreements [Member] | Maximum [Member]  
Patents (Year) 14 years