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Business Acquisitions and Dispositions - Schedule of Valuation Identified Assets Acquired and Liabilities Assumed (Details) - USD ($) | Oct. 01, 2021 | Aug. 23, 2021 | Nov. 01, 2020 | Oct. 01, 2020 | Dec. 31, 2021 | Dec. 31, 2020
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ASSETS |  |  |  |  |  |
Total intangible assets |  |  |  |  | $ 43,749,000 |
Liabilities: |  |  |  |  |  |
Noncontrolling interests |  |  |  |  | (568,000) | $ (11,000)
Customer Relationships |  |  |  |  |  |
ASSETS |  |  |  |  |  |
Total intangible assets |  |  |  |  | 32,422,000 |
Developed technology |  |  |  |  |  |
ASSETS |  |  |  |  |  |
Total intangible assets |  |  |  |  | 5,473,000 |
Non-compete agreements |  |  |  |  |  |
ASSETS |  |  |  |  |  |
Total intangible assets |  |  |  |  | 1,982,000 |
Tradenames |  |  |  |  |  |
ASSETS |  |  |  |  |  |
Total intangible assets |  |  |  |  | $ 3,872,000 |
Crawford Carvallo |  |  |  |  |  |
ASSETS |  |  |  |  |  |
Cash and cash equivalents |  |  |  | $ 1,599,000 |  |
Accounts receivable |  |  |  | 3,631,000 |  |
Unbilled revenues |  |  |  | 3,237,000 |  |
Right-of-use lease assets |  |  |  | 8,743,000 |  |
Other assets |  |  |  | 4,660,000 |  |
Total tangible assets |  |  |  | 21,870,000 |  |
Total intangible assets |  |  |  | 15,056,000 |  |
Total assets acquired |  |  |  | 36,926,000 |  |
Liabilities: |  |  |  |  |  |
Current liabilities |  |  |  | 4,657,000 |  |
Operating lease liability |  |  |  | 8,743,000 |  |
Tax liabilities |  |  |  | 2,599,000 |  |
Total liabilities assumed |  |  |  | 15,999,000 |  |
Net Assets Acquired, Before Noncontrolling Interests |  |  |  | 20,927,000 |  |
Noncontrolling interests |  |  |  | 489,000 |  | $ 3,047,000
Net Assets Acquired, After Noncontrolling Interests |  |  |  | 20,438,000 |  |
Purchase price (cash) |  |  |  | 11,583,000 |  |
Fair value of noncontrolling interest previously held |  |  |  | 3,047,000 |  |
Deferred purchase consideration payable |  |  |  | 0 |  |
Fair value of contingent consideration |  |  |  | 5,808,000 |  |
Fair value of total consideration transferred |  |  |  | 20,438,000 |  |
Crawford Carvallo | Customer Relationships |  |  |  |  |  |
ASSETS |  |  |  |  |  |
Total intangible assets |  |  |  | 4,118,000 |  |
Crawford Carvallo | Developed technology |  |  |  |  |  |
ASSETS |  |  |  |  |  |
Total intangible assets |  |  |  | 1,300,000 |  |
Crawford Carvallo | Non-compete agreements |  |  |  |  |  |
ASSETS |  |  |  |  |  |
Total intangible assets |  |  |  | 1,600,000 |  |
Crawford Carvallo | Tradenames |  |  |  |  |  |
ASSETS |  |  |  |  |  |
Total intangible assets |  |  |  | 300,000 |  |
Crawford Carvallo | Goodwill |  |  |  |  |  |
ASSETS |  |  |  |  |  |
Total intangible assets |  |  |  | $ 7,738,000 |  |
HBA Group |  |  |  |  |  |
ASSETS |  |  |  |  |  |
Cash and cash equivalents |  |  | $ 240,000 |  |  |
Accounts receivable |  |  | 1,081,000 |  |  |
Unbilled revenues |  |  | 598,000 |  |  |
Right-of-use lease assets |  |  | 1,502,000 |  |  |
Other assets |  |  | 205,000 |  |  |
Total tangible assets |  |  | 3,626,000 |  |  |
Total intangible assets |  |  | 7,819,000 |  |  |
Total assets acquired |  |  | 11,445,000 |  |  |
Liabilities: |  |  |  |  |  |
Current liabilities |  |  | 2,532,000 |  |  |
Operating lease liability |  |  | 1,502,000 |  |  |
Tax liabilities |  |  | 976,000 |  |  |
Total liabilities assumed |  |  | 5,010,000 |  |  |
Net Assets Acquired, Before Noncontrolling Interests |  |  | 6,435,000 |  |  |
Net Assets Acquired, After Noncontrolling Interests |  |  | 6,435,000 |  |  |
Purchase price (cash) |  |  | 4,026,000 |  |  |
Fair value of noncontrolling interest previously held |  |  | 0 |  |  |
Deferred purchase consideration payable |  |  | 0 |  |  |
Fair value of contingent consideration |  |  | 2,409,000 |  |  |
Fair value of total consideration transferred |  |  | 6,435,000 |  |  |
HBA Group | Customer Relationships |  |  |  |  |  |
ASSETS |  |  |  |  |  |
Total intangible assets |  |  | 1,574,000 |  |  |
HBA Group | Developed technology |  |  |  |  |  |
ASSETS |  |  |  |  |  |
Total intangible assets |  |  | 0 |  |  |
HBA Group | Non-compete agreements |  |  |  |  |  |
ASSETS |  |  |  |  |  |
Total intangible assets |  |  | 0 |  |  |
HBA Group | Tradenames |  |  |  |  |  |
ASSETS |  |  |  |  |  |
Total intangible assets |  |  | 0 |  |  |
HBA Group | Goodwill |  |  |  |  |  |
ASSETS |  |  |  |  |  |
Total intangible assets |  |  | $ 6,245,000 |  |  |
Edjuster Inc |  |  |  |  |  |
ASSETS |  |  |  |  |  |
Cash and cash equivalents |  | $ 1,723,000 |  |  |  |
Accounts receivable |  | 1,518,000 |  |  |  |
Unbilled revenues |  | 1,531,000 |  |  |  |
Right-of-use lease assets |  | 418,000 |  |  |  |
Other assets |  | 1,520,000 |  |  |  |
Total tangible assets |  | 6,710,000 |  |  |  |
Total intangible assets |  | 22,076,000 |  |  |  |
Total assets acquired |  | 28,786,000 |  |  |  |
Liabilities: |  |  |  |  |  |
Current liabilities |  | 2,066,000 |  |  |  |
Operating lease liability |  | 418,000 |  |  |  |
Tax liabilities |  | 2,557,000 |  |  |  |
Total liabilities assumed |  | 5,041,000 |  |  |  |
Net Assets Acquired, Before Noncontrolling Interests |  | 23,745,000 |  |  |  |
Net Assets Acquired, After Noncontrolling Interests |  | 23,745,000 |  |  |  |
Purchase price (cash) |  | 20,875,000 |  |  |  |
Fair value of noncontrolling interest previously held |  | 0 |  |  |  |
Deferred purchase consideration payable |  | 433,000 |  |  |  |
Fair value of contingent consideration |  | 2,437,000 |  |  |  |
Fair value of total consideration transferred |  | 23,745,000 |  |  |  |
Edjuster Inc | Customer Relationships |  |  |  |  |  |
ASSETS |  |  |  |  |  |
Total intangible assets |  | 5,346,000 |  |  |  |
Edjuster Inc | Developed technology |  |  |  |  |  |
ASSETS |  |  |  |  |  |
Total intangible assets |  | 2,673,000 |  |  |  |
Edjuster Inc | Non-compete agreements |  |  |  |  |  |
ASSETS |  |  |  |  |  |
Total intangible assets |  | 157,000 |  |  |  |
Edjuster Inc | Tradenames |  |  |  |  |  |
ASSETS |  |  |  |  |  |
Total intangible assets |  | 1,101,000 |  |  |  |
Edjuster Inc | Goodwill |  |  |  |  |  |
ASSETS |  |  |  |  |  |
Total intangible assets |  | $ 12,799,000 |  |  |  |
Praxis Consulting Inc |  |  |  |  |  |
ASSETS |  |  |  |  |  |
Cash and cash equivalents | $ 0 |  |  |  |  |
Accounts receivable | 119,000 |  |  |  |  |
Unbilled revenues | 0 |  |  |  |  |
Right-of-use lease assets | 430,000 |  |  |  |  |
Other assets | 316,000 |  |  |  |  |
Total tangible assets | 865,000 |  |  |  |  |
Total intangible assets | 50,045,000 |  |  |  |  |
Total assets acquired | 50,910,000 |  |  |  |  |
Liabilities: |  |  |  |  |  |
Current liabilities | 4,133,000 |  |  |  |  |
Operating lease liability | 430,000 |  |  |  |  |
Tax liabilities | 0 |  |  |  |  |
Total liabilities assumed | 4,563,000 |  |  |  |  |
Net Assets Acquired, Before Noncontrolling Interests | 46,347,000 |  |  |  |  |
Net Assets Acquired, After Noncontrolling Interests | 46,347,000 |  |  |  |  |
Purchase price (cash) | 21,544,000 |  |  |  |  |
Fair value of noncontrolling interest previously held | 0 |  |  |  |  |
Deferred purchase consideration payable | 20,735,000 |  |  |  |  |
Fair value of contingent consideration | 4,068,000 |  |  |  |  |
Fair value of total consideration transferred | 46,347,000 |  |  |  |  |
Praxis Consulting Inc | Customer Relationships |  |  |  |  |  |
ASSETS |  |  |  |  |  |
Total intangible assets | 20,000,000 |  |  |  |  |
Praxis Consulting Inc | Developed technology |  |  |  |  |  |
ASSETS |  |  |  |  |  |
Total intangible assets | 1,500,000 |  |  |  |  |
Praxis Consulting Inc | Non-compete agreements |  |  |  |  |  |
ASSETS |  |  |  |  |  |
Total intangible assets | 225,000 |  |  |  |  |
Praxis Consulting Inc | Tradenames |  |  |  |  |  |
ASSETS |  |  |  |  |  |
Total intangible assets | 2,125,000 |  |  |  |  |
Praxis Consulting Inc | Goodwill |  |  |  |  |  |
ASSETS |  |  |  |  |  |
Total intangible assets | 26,195,000 |  |  |  |  |
Bosboon Expertise Group B V |  |  |  |  |  |
ASSETS |  |  |  |  |  |
Cash and cash equivalents | 0 |  |  |  |  |
Accounts receivable | 469,000 |  |  |  |  |
Unbilled revenues | 597,000 |  |  |  |  |
Right-of-use lease assets | 586,000 |  |  |  |  |
Other assets | 75,000 |  |  |  |  |
Total tangible assets | 1,727,000 |  |  |  |  |
Total intangible assets | 3,301,000 |  |  |  |  |
Total assets acquired | 5,028,000 |  |  |  |  |
Liabilities: |  |  |  |  |  |
Current liabilities | 1,430,000 |  |  |  |  |
Operating lease liability | 586,000 |  |  |  |  |
Tax liabilities | 378,000 |  |  |  |  |
Total liabilities assumed | 2,394,000 |  |  |  |  |
Net Assets Acquired, Before Noncontrolling Interests | 2,634,000 |  |  |  |  |
Net Assets Acquired, After Noncontrolling Interests | 2,634,000 |  |  |  |  |
Purchase price (cash) | 2,066,000 |  |  |  |  |
Fair value of noncontrolling interest previously held | 0 |  |  |  |  |
Deferred purchase consideration payable | 0 |  |  |  |  |
Fair value of contingent consideration | 568,000 |  |  |  |  |
Fair value of total consideration transferred | 2,634,000 |  |  |  |  |
Bosboon Expertise Group B V | Customer Relationships |  |  |  |  |  |
ASSETS |  |  |  |  |  |
Total intangible assets | 1,384,000 |  |  |  |  |
Bosboon Expertise Group B V | Developed technology |  |  |  |  |  |
ASSETS |  |  |  |  |  |
Total intangible assets | 0 |  |  |  |  |
Bosboon Expertise Group B V | Non-compete agreements |  |  |  |  |  |
ASSETS |  |  |  |  |  |
Total intangible assets | 0 |  |  |  |  |
Bosboon Expertise Group B V | Tradenames |  |  |  |  |  |
ASSETS |  |  |  |  |  |
Total intangible assets | 346,000 |  |  |  |  |
Bosboon Expertise Group B V | Goodwill |  |  |  |  |  |
ASSETS |  |  |  |  |  |
Total intangible assets | $ 1,571,000 |  |  |  |  |

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