Stockholders' Equity (Narrative) (Details) $ in Millions	6 Months Ended
Dec. 29, 2017 USD ($) shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock issued under ESPP \| shares	524
2007 Stock Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock issued for option exercised \| shares	(191)
2007 Stock Plan \| Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Nonvested awards, unrecognized compensation expense \| $	$ 0.1
Nonvested awards, expense expected to be recognized, weighted average period	7 months 2 days
2007 Stock Plan \| Restricted stock units and performance stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Nonvested awards, unrecognized compensation expense \| $	$ 2.5
Nonvested awards, expense expected to be recognized, weighted average period	1 year 2 months 16 days

Unrecognized cost of unvested share-based compensation awards.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
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