Related Party Transactions - Additional Information (Detail) - USD ($) |
3 Months Ended | 6 Months Ended | |
|---|---|---|---|
Apr. 01, 2016 |
Apr. 01, 2016 |
Apr. 03, 2015 |
|
| Privately Held Company [Member] | Maximum [Member] | |||
| Related Party Transaction [Line Items] | |||
| Other income-related party | $ 100,000 | $ 100,000 | $ 100,000 |
| GaAs Labs [Member] | |||
| Related Party Transaction [Line Items] | |||
| Minimum service requirements or payment obligations | 0 | $ 0 | |
| Notice period to terminate agreement | 30 days | ||
| GaAs Labs [Member] | Maximum [Member] | |||
| Related Party Transaction [Line Items] | |||
| Other income-related party | $ 100,000 | $ 100,000 | |