Consolidated Statements Of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2019	Mar. 31, 2018
Consolidated Statements Of Operations [Abstract]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 111,542	$ 126,861	$ 343,381	$ 376,087
Cost of Goods and Services Sold	(90,214)	(99,229)	(278,786)	(294,913)
Gross margin	21,328	27,632	64,595	81,174
Selling, general and administrative	(22,915)	(19,681)	(62,484)	(57,596)
Environmental Remediation Expense		3,600		3,600
ERP Impairment Expense	18,668		18,668
Gain on sale of facility				1,835
Operating income (loss)	(20,255)	4,351	(16,557)	21,813
Interest and other income	158	158	397	457
Income before income taxes	(20,097)	4,509	(16,160)	22,270
Income tax provision	4,545	(1,430)	3,470	(6,790)
Net income (loss)	$ (15,552)	$ 3,079	$ (12,690)	$ 15,480
WEIGHTED AVERAGE NUMBER OF COMMON SHARES OUTSTANDING:
Basic	7,892	7,853	7,884	7,844
Diluted	7,892	7,930	7,884	7,929
EARNINGS (LOSS) PER SHARE OF COMMON STOCK:
Basic	$ (1.97)	$ 0.39	$ (1.61)	$ 1.97
Diluted	$ (1.97)	$ 0.39	$ (1.61)	$ 1.95