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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands | 6 Months Ended
--- | ---
Oct. 26, 2019 | Oct. 27, 2018
Operating activities |  |
Net income | $ 24,604 | $ 33,366
Gain on sale of business, net of tax |  | (8,452)
Loss from discontinued operations |  | 2,449
Net income from continuing operations | 24,604 | 27,363
Adjustments to reconcile net income to cash provided by (used in) operating activities: |  |
Depreciation and amortization | 4,486 | 3,584
Loss from equity method investments | 2,210 | 1,354
Provision for doubtful accounts | 14 | (27)
Other non-cash expense | 81 |
Non-cash lease expense | 2,255 |
Losses (gains) on foreign currency transactions | 1 | (13)
Deferred income taxes | (669) | (614)
Stock-based compensation | 2,984 | 2,517
Gain on sale of property and equipment | (75) |
Amortization of held-to-maturity investments | (984) | (459)
Changes in operating assets and liabilities: |  |
Accounts receivable | (9,400) | 22,261
Unbilled receivables and retentions | (9,350) | (28,782)
Inventories | 1,621 | (8,671)
Income tax receivable | 821 |
Prepaid expenses and other assets | (1,051) | (831)
Accounts payable | (5,046) | (8,841)
Other liabilities | (4,583) | (6,184)
Net cash provided by operating activities of continuing operations | 7,919 | 2,657
Investing activities |  |
Acquisition of property and equipment | (6,850) | (4,135)
Equity method investments | (4,569) |
Business acquisition, net of cash acquired | (18,641) |
Proceeds from sale of business |  | 31,994
Proceeds from the sale of property and equipment | 81 |
Redemptions of held-to-maturity investments | 159,839 | 153,029
Purchases of held-to-maturity investments | (169,148) | (169,402)
Redemptions of available-for-sale investments |  | 2,250
Purchases of available-for-sale investments | (4,947) |
Net cash (used in) provided by investing activities from continuing operations | (44,235) | 13,736
Financing activities |  |
Principal payments of capital lease obligations |  | (111)
Tax withholding payment related to net settlement of equity awards | (743) | (975)
Exercise of stock options | 93 | 71
Net cash provided by financing activities from continuing operations | (650) | (1,015)
Discontinued operations |  |
Operating activities of discontinued operations | 0 | (7,188)
Investing activities of discontinued operations | 0 | (452)
Financing activities of discontinued operations | 0 | 0
Net cash used in discontinued operations |  | (7,640)
Net (decrease) increase in cash, cash equivalents, and restricted cash | (36,966) | 7,738
Cash, cash equivalents, and restricted cash at beginning of period | 172,708 | 143,517
Cash, cash equivalents, and restricted cash at end of period | 135,742 | 151,255
Cash paid, net during the period for: |  |
Income taxes | 518 | 5,270
Non-cash activities |  |
Unrealized gain on investments, net of deferred tax expense of $51 for the six months ended October 27, 2018 |  | 57
Change in foreign currency translation adjustments | 179 | (31)
Acquisitions of property and equipment included in accounts payable | $ 761 | $ 753

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