Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Operating activities:
Net income	$ 6,237	$ 8,356
Adjustments to reconcile net income to net cash provided by operating activities, net of effects from acquisitions and disposals:
Depreciation and amortization	9,126	10,906
Stock-based compensation expense	5,738	4,353
Deferred income tax	(83)	1,657
Gain on disposal of business (Note 3)	(427)	0
Gain on sale of property, plant and equipment	(727)	(103)
Provision for uncollectible accounts	(34)	12
Other	202	194
Changes in operating assets and liabilities increasing (decreasing) cash, net of effects from acquisitions and disposals:
Accounts receivable	(177)	25,489
Costs and estimated earnings in excess of billings on uncompleted contracts	3,580	26,959
Inventories	(2,816)	(788)
Other assets and liabilities	(10,551)	(475)
Accounts payable	8,622	(34,018)
Billings on uncompleted contracts in excess of costs and estimated earnings	(5,243)	(8,751)
Accrued expenses	37	(4,211)
Net cash provided by operating activities	13,484	29,580
Investing activities:
Acquisition of property, plant and equipment	(6,055)	(4,051)
Acquisition, net of cash acquired	0	(1,687)
Proceeds from disposal of business (Note 3)	3,885
Proceeds from asset sales	923	420
Net cash used by investing activities	(1,247)	(5,318)
Financing activities:
Advances under senior revolving credit facility	8,383	85,669
Repayments of advances under senior revolving credit facility	(8,243)	(79,443)
Payments of debt issuance costs	0	(364)
Open market purchase of treasury shares	(3,230)	0
Issuances of common stock	128	0
Proceeds from issuance of common stock under employee stock purchase plan	153	144
Repurchase of common stock for payment of statutory taxes due on equity-based compensation	(1,651)	(612)
Net cash provided (used) by financing activities	(4,460)	5,394
Effect of exchange rate changes on cash and cash equivalents	(345)	626
Increase in cash and cash equivalents	7,432	30,282
Cash and cash equivalents, beginning of period	64,057	43,805
Cash and cash equivalents, end of period	71,489	74,087
Supplemental disclosure of cash flow information:
Income taxes	255	665
Interest	849	1,340
Non-cash investing and financing activities:
Purchases of property, plant and equipment on account	820	105
Accrual for unsettled stock repurchases	$ 1,960	$ 0