Note 16 - Operating Data (Details) - Geographic Sales and Long-Lived Assets (USD $)	3 Months Ended								12 Months Ended
	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2011
Net Sales
Sales	$ 67,167,000	$ 59,864,000	$ 59,829,000	$ 56,937,000	$ 70,005,000	$ 64,540,000	$ 62,219,000	$ 63,384,000	$ 243,797,000	$ 260,148,000	$ 244,841,000
Long-lived Assets
Long-lived assets	96,846,000				100,936,000				96,846,000	100,936,000	83,236,000
Intersegment Eliminations [Member]
Net Sales
Sales									(17,058,000)	(23,344,000)	(26,161,000)
Long-lived Assets
Long-lived assets	3,628,000				2,764,000				3,628,000	2,764,000	2,813,000
United States [Member]
Net Sales
Sales									133,129,000	142,417,000	136,257,000
Long-lived Assets
Long-lived assets	77,198,000				81,378,000				77,198,000	81,378,000	60,210,000
North America Other Than US [Member]
Net Sales
Sales									12,344	13,144,000	12,406,000
Long-lived Assets
Long-lived assets	449,000				464,000				449,000	464,000	501,000
United Kingdom [Member]
Net Sales
Sales									29,260,000	31,527,000	27,480,000
Long-lived Assets
Long-lived assets	4,527,000				4,349,000				4,527,000	4,349,000	3,802,000
Brazil [Member]
Net Sales
Sales									86,122,000	96,404,000	94,859,000
Long-lived Assets
Long-lived assets	$ 11,044,000				$ 11,981,000				$ 11,044,000	$ 11,981,000	$ 15,910,000