Note 11 - Stockholders' Equity (Details Textual) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions		3 Months Ended		14 Months Ended
	Apr. 28, 2020	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2020	Feb. 14, 2019
Common Stock, Dividends, Per Share, Declared (in dollars per share)		$ 0.095	$ 0.085
Subsequent Event [Member]
Common Stock, Dividends, Per Share, Declared (in dollars per share)	$ 0.095
Dividends Payable, Date to be Paid	Jun. 04, 2020
Dividends Payable, Date of Record	May 20, 2020
Dividends Payable	$ 1.9
Stock Repurchase Program [Member] | Common Stock [Member]
Stock Repurchase Program, Authorized Amount					$ 10.0
Treasury Stock, Shares, Acquired (in shares)				0