Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Cash flows from operating activities:
Net income	$ 7,479	$ 17,953
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization expense	11,546	9,337
Stock-based compensation expense	4,679	4,621
Benefit for deferred income taxes	(381)	(4,186)
Other non-cash items	1,222	378
Changes in operating assets and liabilities, net of effects of businesses acquired:
Accounts receivable, unbilled receivable, and cost in excess of billings	(5,891)	(7,810)
Inventory	(4,553)	(11,149)
Prepaid income taxes	(2,977)	(657)
Prepaid expenses and other current assets	68	(718)
Other non-current assets	88	(595)
Accounts payable and accrued expenses	(2,025)	12,841
Deferred revenues and customer advances	8,828	(627)
Income taxes payable	1,873	(11,279)
Other non-current liabilities	73	(81)
Net cash provided by operating activities	20,029	8,028
Cash flows from investing activities:
Acquisition of business, net of cash acquired	(46,273)	(6,000)
Purchases of property and equipment	(3,727)	(3,628)
Other investing activities	0	(374)
Net cash used in investing activities	(50,000)	(10,002)
Cash flows from financing activities:
Borrowings under credit facilities	45,000	0
Payments for retirement of common stock	(6,812)	(13,548)
Payments of deferred financing and offering costs	(1,851)	0
Net cash provided by (used in) financing activities	36,337	(13,548)
Effect of exchange rate changes on cash and cash equivalents	(18)	(41)
Net increase (decrease) in cash and cash equivalents	6,348	(15,563)
Cash and cash equivalents at beginning of period	66,521	41,637
Cash and cash equivalents at end of period	72,869	26,074
Cash paid during the period for:
Interest	3,442	3
Income taxes	$ 4,291	$ 7,851