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Segment and Geographic Information (Schedule of Revenues by Geographic Region) (Details) $ in Thousands | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Mar. 29, 2019 USD ($) | Mar. 30, 2018 USD ($) | Mar. 29, 2019 USD ($) segment | Mar. 30, 2018 USD ($) | Jun. 29, 2018
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |
Number of reportable segments | segment |  |  | 1 |  |
Total revenues | $ 54,037 | $ 62,093 | $ 179,629 | $ 179,998 |
Revenue | Customer Concentration Risk | MTN |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |
Concentration risk percentage | 13.00% | 17.00% | 12.00% | 14.00% |
Revenue | Customer Concentration Risk | Globe |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |
Concentration risk percentage | 12.00% |  |  |  |
Accounts receivable | Customer Concentration Risk | MTN |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |
Concentration risk percentage |  |  | 27.00% |  | 13.00%
Accounts receivable | Customer Concentration Risk | Globe |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |
Concentration risk percentage |  |  | 10.00% |  |
North America |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |
Total revenues | $ 28,581 | $ 31,756 | $ 93,660 | $ 99,743 |
Africa and the Middle East |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |
Total revenues | 11,079 | 17,623 | 39,058 | 43,767 |
Europe and Russia |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |
Total revenues | 3,326 | 3,638 | 10,271 | 11,898 |
Latin America and Asia Pacific |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |
Total revenues | $ 11,051 | $ 9,076 | $ 36,640 | $ 24,590 |

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