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Stock-Based Compensation - Additional Information (Details) $ / shares in Units, $ in Millions |  | 12 Months Ended |  |
--- | --- | --- | --- | ---
Nov. 15, 2017 shares | Jun. 30, 2018 USD ($) executive $ / shares shares | Jul. 01, 2017 USD ($) | Aug. 01, 2015 USD ($)
Stock-Based Compensation |  |  |  |
Shares of common stock available for grant (in shares) | shares |  | 14,800,000 |  |
Stock-based compensation capitalized to inventory |  | $ 0.8 |  |
Total incremental stock-based compensation expense |  |  |  | $ 13.6
Extended exercise period for fully exercisable options resulted from modification |  | 2 years |  |
Number of executives impacted by plan modification (in executive) | executive |  | 6 |  |
Incremental stock-based compensation cost |  | $ 6.3 |  |
Closing stock price of company (in dollars per share) | $ / shares |  | $ 10.24 |  |
Number of exercisable in-the-money options (in shares) | shares |  | 600,000 |  |
Cumulative adjustment from adoption of ASU 2016-09 (Topic 718) |  |  | $ 0.0 |
Operating loss carryforwards |  |  | 117.7 |
Minimum remaining maturity period of traded options of the entity's common stock upon which implied volatility is based |  | 6 months |  |
2003 Plan |  |  |  |
Stock-Based Compensation |  |  |  |
Common stock added to the pool of shares reserved for issuance under the plan (in shares) | shares | 4,000,000 |  |  |
Number of shares authorized (in shares) | shares | 5,500,000 |  |  |
Stock options and Full Value Awards issued and outstanding (in shares) | shares |  | 7,700,000 |  |
1998 Purchase Plan |  |  |  |
Stock-Based Compensation |  |  |  |
Shares of common stock available for grant (in shares) | shares |  | 4,300,000 |  |
Discount rate provided under purchase plan |  | 5.00% |  |
Look-back period |  | 6 months |  |
Options |  |  |  |
Stock-Based Compensation |  |  |  |
Total intrinsic value of awards exercised (in dollars) |  | $ 1.2 |  |
Unrecognized stock-based compensation |  | $ 1.0 |  |
Estimated amortization period |  | 1 year 7 months 2 days |  |
Employee Stock Purchase Plan |  |  |  |
Stock-Based Compensation |  |  |  |
Unrecognized stock-based compensation |  | $ 0.1 |  |
Full Value Awards |  |  |  |
Stock-Based Compensation |  |  |  |
Unrecognized stock-based compensation |  | $ 38.5 |  |
Estimated amortization period |  | 1 year 8 months 2 days |  |
Minimum | Options |  |  |  |
Stock-Based Compensation |  |  |  |
Vesting period |  | 3 years |  |
Stock awards expiration period |  | 5 years |  |
Minimum | Full Value Awards |  |  |  |
Stock-Based Compensation |  |  |  |
Vesting period |  | 1 year |  |
Maximum | Options |  |  |  |
Stock-Based Compensation |  |  |  |
Vesting period |  | 4 years |  |
Stock awards expiration period |  | 10 years |  |
Maximum | Full Value Awards |  |  |  |
Stock-Based Compensation |  |  |  |
Vesting period |  | 4 years |  |
Accumulated Deficit |  |  |  |
Stock-Based Compensation |  |  |  |
Cumulative adjustment from adoption of ASU 2016-09 (Topic 718) |  |  | $ 0.6 |

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