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Consolidated Statements of Cash Flows - USD ($)
$ in Thousands
 9 Months Ended
Jan. 29, 2022
Jan. 30, 2021
Operating activities    
Net (loss) income $ (11,397) $ 12,373
Adjustments to reconcile net (loss) income to cash (used in) provided by operating activities:    
Depreciation and amortization 47,437 8,650
(Income) loss from equity method investments, net (799) 10,891
Amortization of debt issuance costs 386  
Realized gain from sale of available-for-sale investments   (11)
Provision for doubtful accounts (20) (145)
Other non-cash expense (income) 440 (473)
Non-cash lease expense 5,033 3,592
Loss on foreign currency transactions 34 1
Deferred income taxes (1,195) (897)
Stock-based compensation 3,957 4,754
Loss on disposal of property and equipment 5,063 2
Amortization of debt securities 117 143
Changes in operating assets and liabilities, net of acquisitions:    
Accounts receivable 21,901 47,184
Unbilled receivables and retentions (25,597) 14,753
Inventories (21,590) (7,569)
Income taxes receivable (26,208)  
Prepaid expenses and other assets 1,789 (1,622)
Accounts payable (10,720) (3,346)
Other liabilities (11,807) (9,318)
Net cash (used in) provided by operating activities (23,176) 78,962
Investing activities    
Acquisition of property and equipment (17,064) (8,472)
Equity method investments (6,884) (2,150)
Business acquisitions, net of cash acquired (46,150)  
Redemptions of available-for-sale investments 35,851 130,066
Purchases of available-for-sale investments (2,987) (125,644)
Other 225  
Net cash used in investing activities (37,009) (6,200)
Financing activities    
Principal payments of loan (7,500)  
Holdback and retention payments for business acquisition (5,991) (1,492)
Tax withholding payment related to net settlement of equity awards (1,176) (1,955)
Exercise of stock options 2,776 86
Other (23)  
Net cash used in financing activities (11,914) (3,361)
Effects of currency translation on cash and cash equivalents (613)  
Net (decrease) increase in cash, cash equivalents, and restricted cash (72,712) 69,401
Cash, cash equivalents and restricted cash at beginning of period 157,063 255,142
Cash, cash equivalents and restricted cash at end of period 84,351 324,543
Cash paid, net during the period for:    
Income taxes 1,923 2,364
Interest 3,465  
Non-cash activities    
Unrealized loss on available-for-sale investments, net of deferred tax benefit of $1 and $2 for the nine months ended January 29, 2022 and January 30, 2021, respectively 6 56
Change in foreign currency translation adjustments (3,771) 75
Issuances of inventory to property and equipment, ISR in-service assets 16,680  
Acquisitions of property and equipment included in accounts payable $ 626 $ 746