v3.21.1

Leases - Additional Information (Detail) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Mar. 26, 2021 | Mar. 27, 2020 | Mar. 26, 2021 | Mar. 27, 2020
Operating lease rental expense | $ 0.7 | $ 0.5 | $ 1.9 | $ 1.5
Operating lease rental expense short term | $ 0.1 |  | $ 0.3 |
Minimum |  |  |  |
Lessee operating lease option to extend term | 1 year |  |  |
Maximum |  |  |  |
Lessee operating lease option to extend term | 5 years |  |  |

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- Definition Lessee operating lease option to extend term. + References No definition available. + Details
Name: | fn_LesseeOperatingLeaseOptionToExtendTerm
Namespace Prefix: | fn_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Definition Operating Lease Rental Expense + References No definition available. + Details
Name: | fn_OperatingLeaseRentalExpense
Namespace Prefix: | fn_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Operating lease rental expense short term. + References No definition available. + Details
Name: | fn_OperatingLeaseRentalExpenseShortTerm
Namespace Prefix: | fn_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |