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Commitments and Contingencies (Additional Information) (Details) - USD ($) | Nov. 13, 2023 | Dec. 22, 2021
--- | --- | ---
Secured Loan default judgment |  | $ 7,984,180
Maximum [Member] |  |
Available Limits Under Policy | $ 750,000,000 |

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Namespace Prefix: | nick_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Secured Loan default judgment + References No definition available. + Details
Name: | nick_SecuredLoanDefaultJudgment
Namespace Prefix: | nick_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |