Note 10 - Net Income Per Share - Weighted Average Number of Shares Used to Compute Net EPS (Details) - shares shares in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Basic weighted average common shares outstanding (in shares)	7,544	7,507
Weighted average common equivalent shares due to restricted stock, stock options and RSUs (in shares)	86	63
Diluted weighted average common shares outstanding (in shares)	7,630	7,570