Consolidated Statements Of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2018	Dec. 31, 2017
Consolidated Statements Of Operations [Abstract]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 118,352	$ 129,392	$ 231,839	$ 249,226
Cost of Goods and Services Sold	(96,878)	(101,990)	(188,574)	(195,684)
Gross margin	21,474	27,402	43,265	53,542
Selling, general and administrative	(19,371)	(19,679)	(39,567)	(37,915)
Gain on sale of facility				1,835
Operating income (loss)	2,103	7,723	3,698	17,462
Interest and other income	58	158	239	299
Income before income taxes	2,161	7,881	3,937	17,761
Income tax provision	(595)	(1,660)	(1,075)	(5,360)
Net income (loss)	$ 1,566	$ 6,221	$ 2,862	$ 12,401
WEIGHTED AVERAGE NUMBER OF COMMON SHARES OUTSTANDING:
Basic	7,885	7,847	7,880	7,839
Diluted	7,917	7,937	7,922	7,931
EARNINGS (LOSS) PER SHARE OF COMMON STOCK:
Basic	$ 0.20	$ 0.79	$ 0.36	$ 1.58
Diluted	$ 0.20	$ 0.78	$ 0.36	$ 1.56