XML 63 R52.htm IDEA: XBRL DOCUMENT
v3.21.2

Share-Based Compensation - Summary of Recognition of Share-Based Compensation related to Employees (Details) - USD ($) $ in Thousands | 1 Months Ended | 3 Months Ended | 8 Months Ended | 9 Months Ended
--- | --- | --- | --- | ---
Jan. 31, 2020 | Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2020 | Sep. 30, 2021
Share-based employee compensation expense |  |  |  |  |
Allocated share based compensation expense | $ 3,976 | $ 1,343 | $ 530 | $ 1,331 | $ 4,569
Cost of Services [Member] |  |  |  |  |
Share-based employee compensation expense |  |  |  |  |
Allocated share based compensation expense | 156 | 3 | 28 | 69 | 76
Product and Technology Expense [Member] |  |  |  |  |
Share-based employee compensation expense |  |  |  |  |
Allocated share based compensation expense | 0 | 55 | 50 | 127 | 176
Selling, General and Administrative Expenses [Member] |  |  |  |  |
Share-based employee compensation expense |  |  |  |  |
Allocated share based compensation expense | $ 3,820 | $ 1,285 | $ 452 | $ 1,135 | $ 4,317

X
- Definition Share-based Payment Arrangement, Expense [Abstract]. + References No definition available. + Details
Name: | fa_ShareBasedPaymentArrangementExpenseAbstract
Namespace Prefix: | fa_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of expense for award under share-based payment arrangement. Excludes amount capitalized. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5047-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 14.F) -URI http://asc.fasb.org/extlink&oid=115993241&loc=d3e301413-122809 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
Name: | us-gaap_AllocatedShareBasedCompensationExpense
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | us-gaap_IncomeStatementLocationAxis=fa_CostOfServicesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IncomeStatementLocationAxis=fa_ProductAndTechnologyExpenseMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IncomeStatementLocationAxis=us-gaap_SellingGeneralAndAdministrativeExpensesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |