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Segment and Geographic Information (Schedule of Revenues by Geographic Region) (Details) $ in Thousands | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Dec. 30, 2016 USD ($) | Jan. 01, 2016 USD ($) | Dec. 30, 2016 USD ($) segments | Jan. 01, 2016 USD ($) | Jul. 01, 2016
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |
Number of reportable segments | segments |  |  | 1 |  |
Revenue | $ 68,536 | $ 70,416 | $ 126,743 | $ 149,971 |
North America |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |
Revenue | 39,353 | 31,844 | 67,937 | 67,064 |
Africa and Middle East |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |
Revenue | 16,770 | 23,703 | 31,119 | 50,991 |
Europe and Russia |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |
Revenue | 2,810 | 5,617 | 7,317 | 12,059 |
Latin America and Asia Pacific |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |
Revenue | $ 9,603 | $ 9,252 | $ 20,370 | $ 19,857 |
Accounts Receivable | Customer Concentration Risk | MTN |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |
Concentration risk percentage |  |  | 13.00% |  | 22.00%
Accounts Receivable | Customer Concentration Risk | Motorola |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |
Concentration risk percentage |  |  | 12.00% |  | 11.00%
Revenue | Customer Concentration Risk | MTN |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |
Concentration risk percentage | 12.00% | 20.00% | 11.00% | 18.00% |
Revenue | Customer Concentration Risk | Motorola |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |
Concentration risk percentage |  | 10.00% |  |  |

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