v3.8.0.1

Related Party Transactions - Narrative (Details) - USD ($) $ / shares in Units, $ in Thousands, shares in Millions |  | 3 Months Ended | 6 Months Ended | 9 Months Ended |
--- | --- | --- | --- | --- | ---
Jun. 29, 2016 | Sep. 30, 2017 | Sep. 24, 2016 | Jul. 01, 2017 | Sep. 30, 2017 | Jul. 01, 2017 | Sep. 24, 2016 | Dec. 31, 2016
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |
Related party revenue |  |  | $ 457 | $ 408 |  | $ 1,281 |  | $ 965 |
Selling and marketing expenses |  |  | 3,655 | 4,698 |  | 11,475 |  | 11,608 |
Accounts receivable |  |  | 221 |  |  | 221 |  |  | $ 150
Unbilled accounts receivable | [1] |  | 5,462 |  |  | 5,462 |  |  | 5,541
Common Stock |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |
Stock repurchased and retired during period, shares |  | 3.7 |  |  |  |  |  |  |
Shares repurchased, price per share |  | $ 8.25 |  |  |  |  |  |  |
Lock-up provision period |  | 90 days |  |  |  |  |  |  |
Affiliated Entity |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |
Related party revenue |  |  | 500 | 400 |  | 1,300 |  | 1,000 |
Selling and marketing expenses |  |  | 3,700 | $ 4,700 |  | 10,300 |  | $ 11,600 |
Accounts receivable |  |  | 200 |  |  | 200 |  |  | 100
Unbilled accounts receivable |  |  | 89 |  |  | 89 |  |  | 286
Deferred revenue |  |  |  |  |  |  |  |  | 200
Other current liabilities |  |  | $ 1,600 |  |  | $ 1,600 |  |  | 1,100
Accounts payable |  |  |  |  |  |  |  |  | $ 100
Director |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |
Selling and marketing expenses |  |  |  |  |  |  | $ 1,400 |  |
Related party expenses |  |  |  |  | $ 1,200 |  |  |  |
[1] | (2) Includes unbilled accounts receivable due from related party of $89 and $286 at September 30, 2017 and December 31, 2016, respectively (Note 13)

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