Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2021
Operating activities:
Net income (loss)	$ (52,361)	$ (63,900)	$ (31,224)
Adjustments to reconcile net income (loss) to net cash provided (used) by operating activities:
Depreciation and amortization	13,694	15,254	17,858
Goodwill and other intangible asset impairment (Note 4)	12,316	18,312	0
Stock-based compensation expense	6,791	7,877	8,156
Operating lease, fixed asset, and other intangible asset impairments due to restructuring (Note 14)	0	0	454
Deferred income tax	0	5,358	889
Gain on sale of property, plant and equipment	(2,841)	(33,114)	(1,201)
Provision for uncollectible accounts	(101)	738	85
Accelerated amortization of deferred debt amendment fees (Note 5)	0	1,518	0
Other	248	169	460
Changes in operating assets and liabilities increasing (decreasing) cash:
Accounts receivable	8,663	(6,587)	11,109
Costs and estimated earnings in excess of billings on uncompleted contracts	(136)	(13,978)	28,774
Inventories	2,506	(2,632)	(882)
Other assets and liabilities	10,538	(530)	(21,916)
Accounts payable	1,210	13,654	(12,387)
Billings on uncompleted contracts in excess of costs and estimated earnings	20,330	11,274	(8,610)
Accrued expenses	(10,610)	(7,609)	5,464
Net cash provided (used) by operating activities	10,247	(54,196)	(2,971)
Investing activities:
Capital expenditures	(9,009)	(3,345)	(4,354)
Proceeds from asset sales (Note 3)	6,466	39,018	2,090
Net cash provided (used) by investing activities	(2,543)	35,673	(2,264)
Financing activities:
Advances under senior secured revolving credit facility	0	0	1,125
Repayments of advances under senior secured revolving credit facility	0	0	(10,913)
Advances under asset-backed credit facility	10,000	20,000	0
Repayments of advances under asset-backed credit facility	(15,000)	(5,000)	0
Payment of debt amendment fees	0	(1,263)	(1,275)
Issuances of common stock	0	199	349
Proceeds from issuance of common stock under employee stock purchase plan	252	270	299
Repurchase of common stock for payment of statutory taxes due on equity-based compensation	(310)	(853)	(1,554)
Repayment of principal portion of long-term liability	0	(654)	(355)
Net cash used by financing activities	(5,058)	12,699	(12,324)
Effect of exchange rate changes on cash	(205)	(683)	1,401
Net increase (decrease) in cash and cash equivalents	2,441	(6,507)	(16,158)
Cash, cash equivalents, and restricted cash, beginning of period (Note1)	77,371	83,878	100,036
Cash, cash equivalents, and restricted cash, end of period (Note1)	79,812	77,371	83,878
Other cash flow information:
Cash paid during the period for income taxes	(13,337)	(2,864)	451
Cash paid during the period for interest	2,093	2,773	1,834
Non-cash investing and financing activities:
Purchases of property, plant and equipment on account	$ 104	$ 54	$ 106