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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Jul. 27, 2019 | Jul. 28, 2018
Operating activities |  |
Net income | $ 17,099 | $ 27,316
Gain on sale of business, net of tax |  | (8,843)
Loss from discontinued operations |  | 1,850
Net income from continuing operations | 17,099 | 20,323
Adjustments to reconcile net income to cash provided by (used in) operating activities: |  |
Depreciation and amortization | 2,079 | 1,746
Loss from equity method investments | 1,347 | 602
Provision for doubtful accounts | 11 | (48)
Other non-cash expense | 32 |
Non-cash lease expense | (251) |
Losses (gains) on foreign currency transactions | 1 | (2)
Deferred income taxes | (349) | (306)
Stock-based compensation | 1,566 | 1,287
Gain on sale of property and equipment | (75) |
Amortization of held-to-maturity investments | (527) | (115)
Changes in operating assets and liabilities: |  |
Accounts receivable | (11,557) | 43,189
Unbilled receivables and retentions | 5,112 | (42,998)
Inventories | (1,946) | (4,819)
Income tax receivable | 821 |
Prepaid expenses and other assets | (616) | (133)
Accounts payable | (5,110) | (9,893)
Other liabilities | (4,524) | (3,797)
Net cash provided by operating activities of continuing operations | 3,113 | 5,036
Investing activities |  |
Acquisition of property and equipment | (1,902) | (1,423)
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 | 65,035 | 78,909
Purchases of held-to-maturity investments | (70,463) | (81,646)
Redemptions of available-for-sale investments |  | 2,250
Purchases of available-for-sale investments | (2,693) |
Net cash (used in) provided by investing activities from continuing operations | (33,152) | 30,084
Financing activities |  |
Principal payments of capital lease obligations |  | (57)
Tax withholding payment related to net settlement of equity awards | (668) | (819)
Exercise of stock options | 93 | 67
Net cash provided by financing activities from continuing operations | (575) | (809)
Discontinued operations |  |
Operating activities of discontinued operations | 0 | (6,609)
Investing activities of discontinued operations | 0 | (431)
Financing activities of discontinued operations | 0 | 0
Net cash used in discontinued operations |  | (7,040)
Net (decrease) increase in cash, cash equivalents, and restricted cash | (30,614) | 27,271
Cash, cash equivalents, and restricted cash at beginning of period | 172,708 | 143,517
Cash, cash equivalents, and restricted cash at end of period | 142,094 | 170,788
Cash paid, net during the period for: |  |
Income taxes | 294 | (7)
Non-cash activities |  |
Unrealized gain on investments, net of deferred tax expense of $51 for the three months ended July 28, 2018 |  | 57
Change in foreign currency translation adjustments | 169 | (20)
Acquisitions of property and equipment included in accounts payable | $ 1,253 | $ 595

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