Note 17 - Summary of Quarterly Results (Unaudited) (Details) - Quarterly Results - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended												12 Months Ended
	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2015		Jun. 30, 2014		Jun. 30, 2013		Jun. 30, 2012	Jun. 30, 2011
2015
Net sales (in Dollars)	$ 76,073	$ 68,603	$ 84,715	$ 78,466	$ 73,858	$ 68,996	$ 76,123	$ 80,486	$ 68,837	$ 66,152	$ 71,082	$ 74,719	$ 307,857	[1]	$ 299,463	[1]	$ 280,790	[1]	$ 268,402	$ 293,501
Gross profit (in Dollars)	18,981	16,305	20,555	18,608	15,704	13,715	16,757	19,122	14,736	13,921	13,882	17,871	74,449		65,298		60,410
Net income (in Dollars)	$ 1,643	$ 393	$ 1,588	$ 1,527	$ (796)	$ (1,009)	$ 870	$ 1,865	$ 812	$ (315)	$ (2,450)	$ 1,830	$ 5,151		$ 930		$ (123)		$ 3,224	$ 10,828
Earnings per share
Basic	$ 0.07	$ 0.02	$ 0.06	$ 0.06	$ (0.03)	$ (0.04)	$ 0.04	$ 0.08	$ 0.03	$ (0.01)	$ (0.10)	$ 0.08	$ 0.21		$ 0.04		$ (0.01)		$ 0.13	$ 0.45
Diluted	0.07	0.02	0.06	0.06	(0.03)	(0.04)	0.04	0.08	0.03	(0.01)	(0.10)	0.08	$ 0.21		$ 0.04		$ (0.01)		$ 0.13	$ 0.44
Fiscal Year [Member]
2015
Net sales (in Dollars)													$ 307,857		$ 299,463		$ 280,790
Gross profit (in Dollars)													74,449		65,298		60,410
Net income (in Dollars)													$ 5,151		$ 930		$ (123)
Earnings per share
Basic													$ 0.21		$ 0.04	[2]	$ (0.01)	[2]
Diluted													0.21		0.04	[2]	(0.01)	[2]
Maximum [Member]
Range of share prices
Share price	10.24	9.17	7.70	8.49	8.78	9.67	9.60	9.00	8.46	7.77	7.38	7.42	10.24		8.78		8.46
Maximum [Member] | Fiscal Year [Member]
Range of share prices
Share price	10.24				9.67				8.46				10.24		9.67		8.46
Minimum [Member]
Range of share prices
Share price	8.02	$ 5.84	$ 5.61	$ 6.00	7.10	$ 7.54	$ 7.76	$ 6.65	6.78	$ 6.80	$ 6.10	$ 6.19	8.02		7.10		6.78
Minimum [Member] | Fiscal Year [Member]
Range of share prices
Share price	$ 5.61				$ 6.65				$ 6.10				$ 5.61		$ 6.65		$ 6.10

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

[2] The total of the earnings per share for each of the four quarters does not equal the total earnings per share for the full year because the calculations are based on the average shares outstanding during each of the individual periods.