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v3.22.0.1

Consolidated Statements of Cash Flows - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Cash flows from operating activities: |  |  |
Net income | $ 49,387 | $ 58,293 | $ 25,791
Adjustments to reconcile net income to net cash provided by (used in) operating activities: |  |  |
Depreciation and amortization | 13,906 | 18,931 | 19,406
Stock-based compensation | 25,995 | 30,505 | 29,137
Gain/loss on investments, net | 1,362 | 6,222 | 224
Change in fair value of contingent consideration | (3,003) | (2,928) | (25)
Deferred income taxes | 4,498 | (9,386) | (1,379)
Provision for excess and obsolete inventory | 3,877 | 7,872 | 3,878
Other | 0 | 74 | (170)
Changes in assets and liabilities: |  |  |
Accounts receivable, net | 75,894 | (59,885) | 26,500
Inventories | (147,432) | 55,505 | 4,504
Prepaid expenses and other assets | (4,127) | 4,833 | (1,654)
Accounts payable | (16,493) | 9,744 | (56,614)
Accrued employee compensation | (10,316) | 15,718 | (11,642)
Other accrued liabilities | 4,869 | 28,194 | (16,603)
Deferred revenue | 2,978 | 8,112 | (3,354)
Income taxes payable | (5,974) | 9,346 | (4,474)
Net cash provided by (used in) operating activities | (4,579) | 181,150 | 13,525
Cash flows from investing activities: |  |  |
Purchases of short-term investments | (146) | (305) | (1,617)
Proceeds from maturities of short-term investments | 710 | 290 | 70,790
Purchases of property and equipment | (9,864) | (10,296) | (14,230)
Purchases of long-term investments | (685) | (6,525) | (5,484)
Net cash provided by (used in) investing activities | (9,985) | (16,836) | 49,459
Cash flows from financing activities: |  |  |
Repurchases of common stock | (75,000) | (23,800) | (75,946)
Restricted stock unit withholdings | (7,660) | (5,090) | (6,521)
Proceeds from exercise of stock options | 9,620 | 16,950 | 5,027
Proceeds from issuance of common stock under employee stock purchase plan | 4,916 | 3,878 | 3,617
Net cash used in financing activities | (68,124) | (8,062) | (73,823)
Net increase (decrease) in cash and cash equivalents | (82,688) | 156,252 | (10,839)
Cash and cash equivalents, at beginning of period | 346,460 | 190,208 | 201,047
Cash and cash equivalents, at end of period | 263,772 | 346,460 | 190,208
Supplemental Cash Flow Information: |  |  |
Cash paid for income taxes, net | 20,589 | 8,218 | 8,876
Non-cash investing and financing activities: |  |  |
Unpaid property and equipment | $ 526 | $ 1,273 | $ 426

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