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CONDENSED UNAUDITED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands | 9 Months Ended
--- | ---
Oct. 02, 2016 | Sep. 27, 2015
Cash flows from operating activities: |  |
Net loss | $ (15,290) | $ (13,002)
Adjustments to reconcile net loss to net cash used in operating activities: |  |
Depreciation and amortization | 972 | 1,075
Stock-based compensation | 1,458 | 1,496
Write-down of inventories | 236 | 14
Write-off of equipment | 351 | 8
Changes in operating assets and liabilities: |  |
Accounts receivable | 579 | (81)
Inventories | 1,199 | 2,566
Other assets | 408 | 421
Trade payables | (2,132) | 397
Accrued liabilities and deferred revenue | 601 | 547
Other long-term liabilities | (76) | 51
Net cash used in operating activities | (11,694) | (6,508)
Cash flows from investing activities: |  |
Capital expenditures for property and equipment | (1,562) | (237)
Net cash used in investing activities | (1,562) | (237)
Cash flows from financing activities: |  |
Payment of debt and capital lease obligations | (259) | (258)
Proceeds from line of credit | 3,000 | 0
Proceeds from issuance of common stock | 10,337 | 394
Stock issuance costs | (1,197) | 0
Net cash provided by financing activities | 11,881 | 136
Net decrease in cash and cash equivalents | (1,375) | (6,609)
Cash and cash equivalents at beginning of period | 19,136 | 30,050
Cash and cash equivalents at end of period | 17,761 | 23,441
Supplemental schedule of non-cash investing and financing activities : |  |
Capital lease obligation to finance capital expenditures | 230 | 349
Purchase of equipment included in accounts payable | $ 323 | $ 125

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