Consolidated Balance Sheets (Unaudited) (Parentheticals) - $ / shares	Mar. 31, 2022	Dec. 31, 2021
Preferred stock, par value, in dollars per share	$ 0.01	$ 0.01
Preferred stock, shares authorized	50,000,000	50,000,000
Preferred stock, shares outstanding	0	0
Common stock, par value, in dollars per share	$ 0.01	$ 0.01
Common stock, shares authorized	300,000,000	300,000,000
Common Stock
Common Stock, Shares, Issued	134,651,380	134,651,380
Common Stock, Held in Treasury
Treasury Stock, Shares	6,331,896	6,735,639