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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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For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

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