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Recent Accounting Pronouncements - Revenue From Contracts With Customers, Financial Statement Impact (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |  |
--- | --- | --- | --- | ---
Jun. 29, 2018 | Jun. 30, 2017 | Jun. 29, 2018 | Jun. 30, 2017 | Jan. 01, 2018 | Dec. 31, 2017
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |
Total net revenue | $ 99,160 | $ 82,315 | $ 189,287 | $ 165,258 |  |
Total cost of revenue | 47,557 | 48,500 | 90,501 | 91,035 |  |
Gross Profit | 51,603 | 33,815 | 98,786 | 74,223 |  |
Selling, general and administrative | 27,988 | 32,625 | 59,151 | 67,256 |  |
Loss from operations | 642 | (27,422) | (8,685) | (48,580) |  |
Loss before income taxes | (2,022) | (30,921) | (14,638) | (55,180) |  |
Net loss | (2,913) | $ (31,500) | (16,607) | $ (55,527) |  |
Accounts receivable, net | 82,635 |  | 82,635 |  |  | $ 69,844
Prepaid expenses and other current assets | 19,377 |  | 19,377 |  |  | 18,931
Other long-term assets | 42,863 |  | 42,863 |  |  | 42,913
Deferred revenue | 56,278 |  | 56,278 |  |  | 52,429
Other non-current liabilities | 19,169 |  | 19,169 |  |  | 22,626
Accumulated deficit | (2,062,988) |  | (2,062,988) |  |  | $ (2,057,812)
Accounting Standards Update 2014-09 [Member] |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |
Accounts receivable, net |  |  |  |  | $ 71,625 |
Prepaid expenses and other current assets |  |  |  |  | 22,509 |
Other long-term assets |  |  |  |  | 43,686 |
Deferred revenue |  |  |  |  | 47,603 |
Other non-current liabilities |  |  |  |  | 22,153 |
Accumulated deficit |  |  |  |  | (2,046,381) |
Calculated under Revenue Guidance in Effect before Topic 606 [Member] | Accounting Standards Update 2014-09 [Member] |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |
Total net revenue | 98,714 |  | 188,037 |  |  |
Total cost of revenue | 47,316 |  | 90,141 |  |  |
Gross Profit | 51,398 |  | 97,896 |  |  |
Selling, general and administrative | 28,570 |  | 59,541 |  |  |
Loss from operations | (145) |  | (9,965) |  |  |
Loss before income taxes | (2,809) |  | (15,918) |  |  |
Net loss | (3,700) |  | (17,887) |  |  |
Accounts receivable, net | 78,065 |  | 78,065 |  |  |
Prepaid expenses and other current assets | 15,918 |  | 15,918 |  |  |
Other long-term assets | 42,360 |  | 42,360 |  |  |
Deferred revenue | 60,032 |  | 60,032 |  |  |
Other non-current liabilities | 19,594 |  | 19,594 |  |  |
Accumulated deficit | (2,075,699) |  | (2,075,699) |  |  |
Difference between Revenue Guidance in Effect before and after Topic 606 [Member] | Accounting Standards Update 2014-09 [Member] |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |
Total net revenue | 446 |  | 1,250 |  |  |
Total cost of revenue | 241 |  | 360 |  |  |
Gross Profit | 205 |  | 890 |  |  |
Selling, general and administrative | (582) |  | (390) |  |  |
Loss from operations | 787 |  | 1,280 |  |  |
Loss before income taxes | 787 |  | 1,280 |  |  |
Net loss | 787 |  | 1,280 |  |  |
Accounts receivable, net | 4,570 |  | 4,570 |  | 1,781 |
Prepaid expenses and other current assets | 3,459 |  | 3,459 |  | 3,578 |
Other long-term assets | 503 |  | 503 |  | 773 |
Deferred revenue | (3,754) |  | (3,754) |  | (4,826) |
Other non-current liabilities | (425) |  | (425) |  | (473) |
Accumulated deficit | $ 12,711 |  | $ 12,711 |  | $ 11,431 |

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- Definition Amount due from customers or clients, within one year of the balance sheet date (or the normal operating cycle, whichever is longer), for goods or services (including trade receivables) that have been delivered or sold in the normal course of business, reduced to the estimated net realizable fair value by an allowance established by the entity of the amount it deems uncertain of collection. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(3)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(4)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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