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Balance Sheet Components (Tables) | 6 Months Ended
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Jul. 01, 2016
Organization, Consolidation and Presentation of Financial Statements [Abstract] |
Accounts Receivable, Net |
| July 1, 2016 |  | December 31, 2015
Accounts receivable, net: |  |  |
Accounts receivable | $ | 107,558 |  |  | $ | 73,855 |
Less: allowances for doubtful accounts, returns and discounts | (4,890 | ) |  | (4,340 | )
Total | $ | 102,668 |  |  | $ | 69,515 |
Prepaid, and Other Current Assets |
| July 1, 2016 |  | December 31, 2015
Prepaid expenses and other current assets: |  |  |
Prepaid inventories to contract manufacturer(1) | $ | 8,500 |  |  | $ | 8,500 |
Prepaid maintenance, royalty, rent and property taxes | 6,530 |  |  | 5,974 |
Other Prepayments | 7,242 |  |  | 2,762 |
Deferred cost of revenue | 10,353 |  |  | 4,601 |
French R&D tax credits receivable(2) | 6,203 |  |  | — |
Restricted cash(3) | 1,328 |  |  | 1,093 |
Other | 3,161 |  |  | 2,073 |
Total | $ | 43,317 |  |  | $ | 25,003 |
(1) From time to time, the Company makes advance payment to a supplier for future inventory in order to secure more favorable pricing. The Company anticipates that this amount will be offset in the first quarter of 2017 against the accounts payable owed to this supplier. (2) The Company’s acquired TVN subsidiary in France (the “TVN French Subsidiary”) participates in the French Crédit d’Impôt Recherche (“CIR”) program (the “R&D tax credits”) which allows companies to monetize eligible research expenses. The French R&D tax credits can be used to offset against income tax payable to the French government in each of the four years after being incurred, or if not utilized, are recoverable in cash. The amount of French R&D tax credits recoverable are subject to audit by the French government and during the second quarter of 2016, the French government approved the 2012 claim and refunded $5.8 million to the TVN French Subsidiary. The remaining R&D tax credit receivables at July 1, 2016 were approximately $23.1 million and are expected to be recoverable from 2017 through 2020 with $6.2 million reported under “Prepaid and other Current Assets” and $16.9 million reported under “Other Long-term Assets” on the Company’s Condensed Consolidated Balance Sheets. Pursuant to the TVN Purchase Agreement, the Company is indemnified by the selling shareholders with respect to the validity and recoverability of the outstanding TVN French Subsidiary R&D tax credit receivables. (3) The restricted cash balances are primarily held as cash collateral security for certain bank guarantees. These restricted funds are invested in bank deposits and cannot be withdrawn from the Company’s accounts without the prior written consent of the applicable secured party. Additionally, as of July 1, 2016, the Company recorded approximately $1.1 million of restricted cash for the bank guarantee associated with the TVN French Subsidiary’s office building lease. This amount is reported under “Other Long-term Assets” on the Company’s Condensed Consolidated Balance Sheets.
Inventories |
| July 1, 2016 |  | December 31, 2015
Inventories: |  |  |
Raw materials | $ | 7,824 |  |  | $ | 5,421 |
Work-in-process | 1,186 |  |  | 1,950 |
Finished goods | 15,640 |  |  | 19,827 |
Service-related spares | 11,974 |  |  | 11,621 |
Total | $ | 36,624 |  |  | $ | 38,819 |
Property and Equipment, Net |
| July 1, 2016 |  | December 31, 2015
Property and equipment, net: |  |  |
Furniture and fixtures | $ | 9,026 |  |  | $ | 7,808 |
Machinery and equipment | 96,257 |  |  | 93,010 |
Capitalized software | 34,428 |  |  | 29,391 |
Leasehold improvements | 13,891 |  |  | 10,000 |
Property and equipment, gross | 153,602 |  |  | 140,209 |
Less: accumulated depreciation and amortization | (117,085 | ) |  | (113,197 | )
Total | $ | 36,517 |  |  | $ | 27,012 |
Accrued Liabilities |
| July 1, 2016 |  | December 31, 2015
Accrued Liabilities: |  |  |
Accrued employee compensation and related expenses | $ | 18,379 |  |  | $ | 12,083 |
Accrued sales and use tax and property taxes | 3,540 |  |  | 1,743 |
Accrued TVN contingent consideration (1) | 2,483 |  |  | — |
Accrued warranty | 5,095 |  |  | 3,913 |
Accrued royalty payments | 2,487 |  |  | 873 |
Contingent inventory reserves | 3,649 |  |  | 1,315 |
Customer deposits and accrued customer rebates | 4,319 |  |  | 1,851 |
Others | 12,394 |  |  | 9,576 |
Total | $ | 52,346 |  |  | $ | 31,354 |
(1) The TVN acquisition is subject to post-closing adjustments as set forth in the TVN Purchase Agreement to be determined within 90 days from the acquisition date in amounts capped to (i) the difference between €76 million (approximately $83.3 million as converted from euros into U.S. dollars using an agreed upon average exchange rate) and $75 million, with respect to an adjustment based on TVN’s 2015 revenue, and (ii) up to $5 million with respect to an adjustment based on TVN’s 2015 backlog that ships during the first half of 2016. During the second quarter of 2016, the Company paid $3.5 million upon the finalization of the revenue and working capital adjustments. The remaining backlog adjustment amount has been finalized at $2.5 million and will be paid in the third quarter of 2016.

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