Note 2 - Liquidity (Details Textual) - USD ($)	3 Months Ended
Jun. 30, 2020	Mar. 31, 2020	Mar. 31, 2019
Proceeds from Warrant Exercises		$ 393,425
Forecast [Member]
Proceeds from Warrant Exercises	$ 4,800,000

The cash inflow associated with the amount received from holders exercising their stock warrants.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 14
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3255-108585

Name:	us-gaap_ProceedsFromWarrantExercises
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration