Note 12 - Acquisition - Unaudited Supplemental Pro-forma Data (Details) - BS Plastic [Member] - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Revenue	$ 15,139,607	$ 14,358,283
Net income attributable to common shareowners from continuing operations	$ (3,754,883)	$ (4,370,052)
Basic earnings per share of common stock from continuing operations (in dollars per share)	$ (0.24)	$ (0.42)