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Condensed Consolidated Statements of Cash Flows - USD ($)
$ in Thousands
 9 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Operating activities:    
Net income (loss) $ (20,599) $ (52,025)
Adjustments to reconcile net loss to net cash used by operating activities:    
Depreciation and amortization 8,337 10,499
Goodwill impairment 0 12,316
Stock-based compensation expense 5,765 5,154
Gain on sale of property, plant and equipment (Note 3) (4,530) (21)
Provision for uncollectible accounts (33) (63)
Other 202 189
Changes in operating assets and liabilities increasing (decreasing) cash:    
Accounts receivable, net of allowance for credit losses (43,080) (9,484)
Costs and estimated earnings in excess of billings on uncompleted contracts 10,288 (8,646)
Inventories (1,620) 1,947
Other assets and liabilities 1,653 10,401
Accounts payable (20,923) (9,344)
Billings on uncompleted contracts in excess of costs and estimated earnings 82,221 49,623
Accrued expenses 7,886 (8,143)
Net cash provided by operating activities 25,567 2,403
Investing activities:    
Capital expenditures (5,689) (6,212)
Proceeds from asset sales 5,535 110
Net cash used by investing activities (154) (6,102)
Net Cash Provided by (Used in) Financing Activities [Abstract]    
Proceeds from Long-Term Lines of Credit 10,000 10,000
Repayments of advances under asset-backed credit facility (20,000) (10,000)
Proceeds from issuance of common stock under employee stock purchase plan 132 200
Repurchase of common stock for payment of statutory taxes due on equity-based compensation (456) (310)
Net cash used by financing activities (10,324) (110)
Effect of exchange rate changes on cash, cash equivalents and restricted cash (243) (358)
Net increase (decrease) in cash, cash equivalents and restricted cash 14,846 (4,167)
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Beginning of Period 79,812 77,371
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, End of Period 94,658 73,204
Supplemental disclosure of cash flow information:    
Income taxes (148) (13,286)
Interest 776 1,675
Non-cash investing and financing activities:    
Purchases of property, plant and equipment on account $ 39 $ 30