Note 10 - Net Income Per Share - Weighted Average Number of Shares Used to Compute Net EPS (Details) - shares shares in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Basic weighted average common shares outstanding (in shares)	7,563	7,527	7,554	7,517
Weighted average common equivalent shares due to restricted stock, stock options and RSUs (in shares)	45	46	64	58
Diluted weighted average common shares outstanding (in shares)	7,608	7,573	7,618	7,575