Note 17 - Quarterly Financial Data (unaudited) (Details) - Quarterly Financial Data (USD $) In Thousands, except Per Share data, unless otherwise specified	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
Quarterly Financial Data [Abstract]
Net sales	$ 67,167	$ 59,864	$ 59,829	$ 56,937	$ 70,005	$ 64,540	$ 62,219	$ 63,384	$ 243,797	$ 260,148	$ 244,841
Gross margin	19,431	15,939	18,753	17,689	12,923	21,455	22,107	21,590	71,812	78,075	81,800
Earnings (loss) before income taxes	1,649	(1,236)	1,121	(738)	(9,105)	2,231	3,234	3,751	796	111	13,239
Net earnings	$ 1,198	$ (1,485)	$ 476	$ (351)	$ (4,646)	$ 1,570	$ 1,715	$ 2,249	$ (162)	$ 888	$ 6,845
Basic earnings (loss) per share (in Dollars per share)	$ 0.18	$ (0.22)	$ 0.07	$ (0.05)	$ (0.69)	$ 0.23	$ 0.25	$ 0.33	$ (0.02)	$ 0.13