Note 6 - Mezzanine Equity (Tables)

9 Months Ended

Sep. 30, 2021

Notes Tables

Schedule of Conversions of Stock [Table Text Block]

	Series D Convertible Redeemable Preferred
Total shares of Series D Preferred Stock - December 31, 2020		22,863
Conversion of Series D Preferred into Common Stock		(354	)
Issuance of Series D Preferred as payment of dividends due		248
Total shares of Series D Preferred Stock - March 31, 2021		22,757
Conversion of Series D Preferred into Common Stock		(50	)
Issuance of Series D Preferred as payment of dividends due		251
Total shares of Series D Preferred Stock - June 30, 2021		22,958
Conversion of Series D Preferred into Common Stock		(242	)
Issuance of Series D Preferred as payment of dividends due		249
Total shares of Series D Preferred Stock - September 30, 2021		22,965