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Subsequent Events - Additional Information (Details) - USD ($) | Apr. 01, 2022 | Oct. 01, 2021 | Feb. 10, 2022
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Subsequent Event [Line Items] |  |  |
Number of shares authorized to be repurchased (shares) |  |  | 5,000,000
Praxis Consulting Inc |  |  |
Subsequent Event [Line Items] |  |  |
Membership interest percentage |  | 100.00% |
Initial lump-sum payment of purchase price |  | $ 21,544,000 |
BosBoon Expertise Group B.V. |  |  |
Subsequent Event [Line Items] |  |  |
Initial lump-sum payment of purchase price |  | $ 2,066,000 |
Subsequent Event | R.P. van Dijk B.V |  |  |
Subsequent Event [Line Items] |  |  |
Initial lump-sum payment of purchase price | $ 4,400,000 |  |
Subsequent Event | R.P. van Dijk B.V | Maximum |  |  |
Subsequent Event [Line Items] |  |  |
Payment to acquire business | $ 2,200,000 |  |

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- Definition Business acquisition initial lump-sum payment. + References No definition available. + Details
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Namespace Prefix: | crda_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Percentage of voting equity interests acquired at the acquisition date in the business combination. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463 + Details
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Balance Type: | na
Period Type: | instant

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- Definition The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=120321790&loc=d3e6927-128479 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3213-108585 + Details
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- Definition The number of shares authorized to be repurchased by an entity's Board of Directors under a stock repurchase plan. + References No definition available. + Details
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Balance Type: | na
Period Type: | instant

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- Definition Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event. + References No definition available. + Details
Name: | us-gaap_SubsequentEventLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
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Namespace Prefix: |
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- Details
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Data Type: | na
Balance Type: |
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- Details
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- Details
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Namespace Prefix: |
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Balance Type: |
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- Details
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