Note 3 - Business Segment Information (Details) - Revenue by Geographic Region (USD $) In Thousands, unless otherwise specified	3 Months Ended				9 Months Ended
	Mar. 31, 2014		Mar. 31, 2013		Mar. 31, 2014		Mar. 31, 2013
Note 3 - Business Segment Information (Details) - Revenue by Geographic Region [Line Items]
Net Sales	$ 68,996	[1]	$ 66,152	[1]	$ 225,605	[1]	$ 211,953	[1]
UNITED STATES
Note 3 - Business Segment Information (Details) - Revenue by Geographic Region [Line Items]
Net Sales	68,711	[1]	66,085	[1]	224,444	[1]	211,738	[1]
CANADA
Note 3 - Business Segment Information (Details) - Revenue by Geographic Region [Line Items]
Net Sales	$ 285	[1]	$ 67	[1]	$ 1,161	[1]	$ 215	[1]

[1] Net sales are attributed to geographic areas based upon the location of the operation making the sale.