XML 85 R71.htm IDEA: XBRL DOCUMENT
v3.22.0.1

Goodwill and Intangible Assets - Goodwill (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 25, 2021 | Dec. 26, 2020
Goodwill [Roll Forward] |  |
Goodwill, beginning balance | $ 212,761 | $ 199,196
Foreign currency translation | (2,068) | 2,346
Goodwill, ending balance | 212,299 | 212,761
FRT GmbH |  |
Goodwill [Roll Forward] |  |
Goodwill, acquired during period |  | 975
Baldwin Park |  |
Goodwill [Roll Forward] |  |
Goodwill, acquired during period | 352 | 5,590
High Precision Devices, Inc. |  |
Goodwill [Roll Forward] |  |
Goodwill, acquired during period | 1,254 | 4,654
Probe Cards |  |
Goodwill [Roll Forward] |  |
Goodwill, beginning balance | 178,072 | 172,482
Foreign currency translation | 0 | 0
Goodwill, ending balance | 178,424 | 178,072
Probe Cards | FRT GmbH |  |
Goodwill [Roll Forward] |  |
Goodwill, acquired during period |  | 0
Probe Cards | Baldwin Park |  |
Goodwill [Roll Forward] |  |
Goodwill, acquired during period | 352 | 5,590
Probe Cards | High Precision Devices, Inc. |  |
Goodwill [Roll Forward] |  |
Goodwill, acquired during period | 0 | 0
Systems |  |
Goodwill [Roll Forward] |  |
Goodwill, beginning balance | 34,689 | 26,714
Foreign currency translation | (2,068) | 2,346
Goodwill, ending balance | 33,875 | 34,689
Systems | FRT GmbH |  |
Goodwill [Roll Forward] |  |
Goodwill, acquired during period |  | 975
Systems | Baldwin Park |  |
Goodwill [Roll Forward] |  |
Goodwill, acquired during period | 0 | 0
Systems | High Precision Devices, Inc. |  |
Goodwill [Roll Forward] |  |
Goodwill, acquired during period | $ 1,254 | $ 4,654

X
- Definition Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(10)(1)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=120320667&loc=SL49117168-202975 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 852 -SubTopic 10 -Section 55 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=84165509&loc=d3e56426-112766 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=99380562&loc=d3e13770-109266 + Details
Name: | us-gaap_Goodwill
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121556970&loc=d3e13816-109267 + Details
Name: | us-gaap_GoodwillAcquiredDuringPeriod
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of foreign currency translation gain (loss) which increases (decreases) an asset representing future economic benefits from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=121556970&loc=d3e13816-109267 + Details
Name: | us-gaap_GoodwillForeignCurrencyTranslationGainLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
Name: | us-gaap_GoodwillRollForward
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=form_FRTGmbHMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=form_BaldwinParkMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=form_HighPrecisionDevicesIncMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=form_ProbeCardsSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=form_SystemsSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |