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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands | 6 Months Ended
--- | ---
Jun. 26, 2020 | Jun. 28, 2019
Cash flows from operating activities: |  |
Net loss | $ (37,355) | $ (23,151)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities: |  |
Amortization of intangibles | 2,462 | 4,162
Depreciation | 5,535 | 5,716
Stock-based compensation | 9,807 | 4,623
Amortization of discount on convertible and other debt | 3,785 | 3,262
Amortization of non-cash warrant | 868 | 48
Loss on debt extinguishment | 834 | 0
Deferred income taxes, net | 1,116 | (145)
Provision for excess and obsolete inventories | 723 | 384
Provision for doubtful accounts, returns and discounts | 662 | 500
Other non-cash adjustments, net | 118 | 79
Changes in operating assets and liabilities: |  |
Accounts receivable | 13,024 | 10,699
Inventories | (4,032) | (2,440)
Prepaid expenses and other assets | 19,182 | (1,526)
Accounts payable | (14,963) | (1,752)
Deferred revenue | 11,241 | 4,989
Income taxes payable | (181) | (292)
Accrued and other liabilities | (11,936) | (9,802)
Net cash provided by (used in) operating activities | 890 | (4,646)
Cash flows from investing activities: |  |
Purchases of property and equipment | (20,753) | (2,939)
Net cash used in investing activities | (20,753) | (2,939)
Cash flows from financing activities: |  |
Payments of convertible debt | (25) |
Payment of convertible debt issuance costs | (35) | 0
Proceeds from other debts and finance leases | 9,398 | 4,503
Repayment of other debts and finance leases | (6,342) | (6,162)
Proceeds from common stock issued to employees | 3,000 | 2,147
Payment of tax withholding obligations related to net share settlements of restricted stock units | (1,049) | (828)
Net cash provided by (used in) financing activities | 4,947 | (340)
Effect of exchange rate changes on cash and cash equivalents | (398) | 0
Net decrease in cash and cash equivalents | (15,314) | (7,925)
Cash, cash equivalents and restricted cash at beginning of period | 93,058 | 65,989
Cash, cash equivalents and restricted cash at end of period | 77,744 | 58,064
Supplemental disclosures of cash flow information: |  |
Income tax payments, net | 809 | 860
Interest payments, net | 2,037 | 2,495
Supplemental schedule of non-cash investing and financing activities: |  |
Capital expenditures incurred but not yet paid | 5,000 | $ 78
Fair value of Convertible Senior Notes due 2022 used to settle Convertible Senior Notes due 2020 | $ 44,357 |

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