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v3.21.1

Consolidated Statements of Cash Flows - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2021 | Mar. 31, 2020
Cash flows from operating activities |  |
Net income | $ 16,480 | $ 11,221
Adjustments to reconcile net income to net cash provided by operating activities: |  |
Depreciation and amortization | 2,645 | 2,363
Deferred income taxes | 1,613 | 899
Stock-based compensation expense | 2,407 | 1,724
Provision for excess and obsolete inventory | 984 | 802
Changes in operating assets and liabilities: |  |
Accounts receivable | 10,431 | 19,223
Inventories | (16,503) | 1,924
Prepaid expenses and other current assets | (3,325) | (4,435)
Accounts payable and other current liabilities | (1,008) | 1,689
Deferred revenue | (909) | 4,859
Income taxes | 2 | 53
Other assets and liabilities | 2,281 | (645)
Net cash provided by operating activities | 15,098 | 39,677
Cash flows from investing activities |  |
Expenditures for property, plant and equipment and capitalized software | (1,347) | (1,290)
Net cash used in investing activities | (1,347) | (1,290)
Cash flows from financing activities |  |
Net settlement on restricted stock grants | (2,354) | (1,162)
Repurchase of common stock | (11,635) | (7,501)
Proceeds from Employee Stock Purchase Plan |  | 19
Principal payments on finance lease obligation | (175) |
Proceeds from exercise of stock options | 2,512 | 4,499
Net cash used in financing activities | (11,652) | (4,145)
Effect of exchange rate changes on cash and cash equivalents | 1,188 | 640
Net increase in cash, cash equivalents and restricted cash | 3,287 | 34,882
Cash, cash equivalents and restricted cash at beginning of period | 204,232 | 146,534
Cash, cash equivalents and restricted cash at end of period | $ 207,519 | $ 181,416

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