Condensed Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) - $ / shares				3 Months Ended	12 Months Ended
	Jul. 02, 2021	Jul. 01, 2021	Jun. 29, 2021	Mar. 31, 2022	Dec. 31, 2021
Preferred stock, par value (in dollars per share)				$ 0.01	$ 0.01
Preferred stock, shares authorized (in shares)				100,000	100,000
Preferred stock, shares issued (in shares)				329	329
Preferred stock, shares outstanding (in shares)				329	329
Preferred stock, dividend rate				8.875%
Common stock, par value (in dollars per share)				$ 0.01	$ 0.01
Common stock, shares authorized (in shares)				70,000,000	70,000,000
Common stock, shares issued (in shares)				50,750,304	43,656,169
Common stock, shares outstanding (in shares)				50,750,304	43,656,169
Series A Preferred Stock [Member]
Preferred stock, par value (in dollars per share)		$ 0.01		$ 0.01	$ 0.01
Preferred stock, shares authorized (in shares)		7,500		7,500	7,500
Preferred stock, shares issued (in shares)				2,300	2,300
Preferred stock, shares outstanding (in shares)				2,300	2,300
Preferred stock, dividend rate	8.875%	8.875%	8.875%	8.875%	8.875%