Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Operating activities:
Net loss	$ (17,538)	$ (3,037)
Adjustments to reconcile net loss to net cash used by operating activities:
Depreciation and amortization	4,052	4,639
Stock-based compensation expense	1,869	2,218
Operating lease impairment due to restructuring	0	150
Deferred income tax	(5,343)	289
Gain on sale of property, plant and equipment	(101)	(941)
Provision for uncollectible accounts	4	(64)
Other Noncash Expense	1,518	0
Other	0	101
Changes in operating assets and liabilities increasing (decreasing) cash:
Accounts receivable	3,134	(10,769)
Costs and estimated earnings in excess of billings on uncompleted contracts	(2,992)	1,854
Inventories	1,028	(291)
Other assets and liabilities	(5,921)	(8,018)
Accounts payable	5,108	(4,431)
Billings on uncompleted contracts in excess of costs and estimated earnings	(2,859)	(366)
Accrued expenses	(1,112)	3,646
Net cash used by operating activities	(19,153)	(15,020)
Investing activities:
Capital expenditures	(219)	(2,777)
Proceeds from asset sales	103	1,074
Net cash used by investing activities	(116)	(1,703)
Financing activities:
Payment of debt amendment fees	(922)	0
Proceeds from issuance of common stock under employee stock purchase plan	76	82
Repurchase of common stock for payment of statutory taxes due on equity-based compensation	(853)	(1,536)
Other	(118)	0
Net cash used by financing activities	(1,817)	(1,454)
Effect of exchange rate changes on cash, cash equivalents and restricted cash	(514)	316
Decrease in cash, cash equivalents and restricted cash	(21,600)	(17,861)
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Beginning of Period	83,878	100,036
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, End of Period	62,278	82,175
Supplemental disclosure of cash flow information:
Income taxes	0	122
Interest paid	1,603	470
Non-cash investing and financing activities:
Purchases of property, plant and equipment on account	$ 51	$ 0