Note 11 - Stockholders' Equity - Basic and Diluted Earnings Per Share Calculation (Details) - shares	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Weighted average shares outstanding for basic calculation (in shares)	2,838,000	2,836,000	2,838,000	1,860,000
Add: Effect of dilutive stock awards (in shares)	35,000	0	35,000	35,000
Weighted average shares outstanding, adjusted for diluted calculation (in shares)	2,873,000	2,836,000	2,873,000	1,895,000