Note 1 - Description of Business and Accounting Policies - Earnings Per Share (Details) - shares	3 Months Ended				12 Months Ended
	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2021	Dec. 31, 2020
Basic (in shares)	19,607	19,603	13,332	13,186	16,640	13,139
Dilutive potential common shares (in shares)					0	0
Diluted (in shares)	19,607	19,603	13,881	13,186	16,640	13,139