Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Operating activities:
Net loss	$ (20,501)	$ (27,352)
Adjustments to reconcile net loss to net cash provided (used) by operating activities:
Depreciation and amortization	13,639	14,388
Goodwill and other intangible asset impairment	0	38,515
Stock-based compensation expense	6,413	8,115
Operating lease impairment due to restructuring	454	2,660
Deferred income tax	1,468	(3,091)
Gain on sale of property, plant and equipment	(1,123)	(536)
Provision for uncollectible accounts	(38)	1,292
Other	317	(110)
Changes in operating assets and liabilities increasing (decreasing) cash:
Accounts receivable	2,610	7,945
Costs and estimated earnings in excess of billings on uncompleted contracts	21,584	39,224
Inventories	243	279
Other assets and liabilities	(17,825)	5,427
Accounts payable	(22,966)	(35,129)
Billings on uncompleted contracts in excess of costs and estimated earnings	(4,394)	(5,060)
Accrued expenses	6,907	(15,080)
Net cash provided (used) by operating activities	(13,212)	31,487
Investing activities:
Capital expenditures	(3,897)	(17,650)
Proceeds from asset sales	1,784	1,018
Net cash used by investing activities	(2,113)	(16,632)
Financing activities:
Advances under senior secured revolving credit facility	1,125	18,567
Repayments of advances under senior secured revolving credit facility	(10,913)	(14,357)
Payment of debt amendment fees	(924)	0
Open market purchase of treasury shares	0	(17,045)
Issuances of common stock	92	0
Proceeds from issuance of common stock under employee stock purchase plan	230	243
Repurchase of common stock for payment of statutory taxes due on equity-based compensation	(1,554)	(3,517)
Repayment of principal portion of long-term liability	(236)	0
Net cash used by financing activities	(12,180)	(16,109)
Effect of exchange rate changes on cash and cash equivalents	1,220	(958)
Decrease in cash and cash equivalents	(26,285)	(2,212)
Cash and cash equivalents, beginning of period	100,036	89,715
Cash and cash equivalents, end of period	73,751	87,503
Supplemental disclosure of cash flow information:
Income taxes	200	5,841
Interest paid	1,404	1,535
Non-cash investing and financing activities:
Purchases of property, plant and equipment on account	$ 33	$ 414