Consolidated Statements Of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2017	Dec. 31, 2016
Consolidated Statements Of Operations [Abstract]
Net sales	$ 129,392	$ 118,530	$ 249,226	$ 230,580
Cost of goods sold	(101,990)	(91,782)	(195,684)	(177,202)
Gross margin	27,402	26,748	53,542	53,378
Selling, general and administrative	(19,679)	(18,332)	(37,915)	(37,258)
Gain on sale of facility			1,835
Operating income (loss)	7,723	8,416	17,462	16,120
Interest and other income	158	103	299	151
Income before income taxes	7,881	8,519	17,761	16,271
Income tax provision	(1,660)	(3,130)	(5,360)	(6,130)
Net income (loss)	$ 6,221	$ 5,389	$ 12,401	$ 10,141
WEIGHTED AVERAGE NUMBER OF COMMON SHARES OUTSTANDING:
Basic	7,847	7,779	7,839	7,752
Diluted	7,937	7,906	7,931	7,865
EARNINGS (LOSS) PER SHARE OF COMMON STOCK:
Basic	$ 0.79	$ 0.69	$ 1.58	$ 1.31
Diluted	$ 0.78	$ 0.68	$ 1.56	$ 1.29