Note 8 - Shareholders' Equity (Details Textual) - shares		9 Months Ended
	Mar. 10, 2016	Nov. 29, 2020	Dec. 01, 2019	Jan. 04, 2021	Jan. 08, 2015	Jan. 07, 2015
Stock Repurchase Program, Number of Shares Authorized to be Repurchased (in shares)					1,250,000
Stock Repurchase Program, Percentage of Outstanding Shares Authorized to be Repurchased						6.00%
Common Stock, Shares, Outstanding, Ending Balance (in shares)						20,945,634
Stock Repurchase Program, Number of Additional Shares Authorized to be Repurchased (in shares)	1,000,000
Stock Repurchased During Period, Shares (in shares)		137,397	0
Subsequent Event [Member]
Stock Repurchase Program, Percentage of Outstanding Shares Authorized to be Repurchased				6.80%
Common Stock, Shares, Outstanding, Ending Balance (in shares)				20,381,426
Stock Repurchase Program, Remaining Number of Shares Authorized to be Repurchased (in shares)				1,394,015