v3.23.1

Cash, cash equivalents and short-term investments - Narrative (Details) | 9 Months Ended
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Mar. 31, 2023
Minimum |
Cash, cash equivalents and marketable securities [Line Items] |
Maturities period of marketable securities | 3 months
Maximum |
Cash, cash equivalents and marketable securities [Line Items] |
Maturities period of marketable securities | 3 years

X
- Definition Cash, cash equivalents and marketable securities + References No definition available. + Details
Name: | fn_CashCashEquivalentsAndMarketableSecuritiesLineItems
Namespace Prefix: | fn_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Marketable securities maturity period. + References No definition available. + Details
Name: | fn_MarketableSecuritiesMaturityPeriod
Namespace Prefix: | fn_
Data Type: | xbrli:durationItemType
Balance Type: | na
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: |