Note 3 - Business Segment Information (Detail) - Revenue by Geographic Region (USD $) In Thousands, unless otherwise specified	3 Months Ended				9 Months Ended
	Mar. 31, 2013		Mar. 31, 2012		Mar. 31, 2013		Mar. 31, 2012
Net Sales	$ 66,152	[1]	$ 62,937	[1]	$ 211,953	[1]	$ 197,206	[1]
United States [Member]
Net Sales	66,085	[1]	62,457	[1]	211,738	[1]	196,057	[1]
Canada [Member]
Net Sales	$ 67	[1]	$ 480	[1]	$ 215	[1]	$ 1,149	[1]

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