Note 1 - Basis of Presentation (Details Textual) - shares	3 Months Ended	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2021	Jun. 30, 2020
Number of Shares Issuable Upon the Exercise of Options and Warrants (in shares)	0	0	792,660
Weighted Average Number Diluted Shares Outstanding Adjustment, Total (in shares)	8,400,000	0
Conversion of Series A Preferred Stock to Common Stock [Member]
Incremental Common Shares Attributable to Dilutive Effect of Conversion of Preferred Stock (in shares)	5,000,000
Conversion of Series B Preferred Stock to Common Stock [Member]
Incremental Common Shares Attributable to Dilutive Effect of Conversion of Preferred Stock (in shares)	1,700,000
Conversion of Series C Preferred Stock to Common Stock [Member]
Incremental Common Shares Attributable to Dilutive Effect of Conversion of Preferred Stock (in shares)	1,700,000