Consolidated Balance Sheets (Parentheticals) - $ / shares	Dec. 31, 2021	Dec. 31, 2020
Preferred Stock:
Preferred stock, par value ($ per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized	50,000,000	50,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common Stock:
Common stock, no par value	$ 0	$ 0
Common stock, share authorized	50,000,000	50,000,000
Common stock, share issued	16,554,846	16,469,272
Common stock, shares outstanding	16,554,846	16,469,272