Amount of outstanding balance of credit facility.

No definition available.

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- Definition

Percentage of funds available under line of credit facility.

+ References

No definition available.

+ Details

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Balance Type:	na
Period Type:	duration

- Definition

Excess spread ratio.

+ References

No definition available.

+ Details

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Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Line of credit interest payment.

+ References

No definition available.

+ Details

Name:	nick_LineOfCreditInterestPayment
Namespace Prefix:	nick_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Termination fee term.

+ References

No definition available.

+ Details

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Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of employees eligible to participate in defined contribution plan.

+ References

No definition available.

+ Details

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Data Type:	xbrli:integerItemType
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- Definition

Maximum amount borrowed under the credit facility at any time during the period.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.19(b),22(b))
-URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of minimum net worth required for mortgage banking as defined by regulatory framework.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 948
-SubTopic 10
-Section 50
-Paragraph 5
-Subparagraph (c)
-URI https://asc.fasb.org/extlink&oid=6490092&loc=d3e47304-110998

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 948
-SubTopic 10
-Section 50
-Paragraph 5
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=6490092&loc=d3e47304-110998

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 948
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (c)(1)
-URI https://asc.fasb.org/extlink&oid=6490092&loc=d3e47080-110998

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 948
-SubTopic 10
-Section 50
-Paragraph 5
-Subparagraph (a)
-URI https://asc.fasb.org/extlink&oid=6490092&loc=d3e47304-110998

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- 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

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- Details

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- Details

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- Details

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Subsequent Events (Detail Textuals) $ in Thousands		3 Months Ended	9 Months Ended
Subsequent Events (Detail Textuals) $ in Thousands	Jan. 18, 2023 USD ($)	Mar. 31, 2023 USD ($)	Dec. 31, 2022	Jul. 18, 2022 Employees
Subsequent Event [Line Items]
Number of employees \| Employees				44
Minimum
Subsequent Event [Line Items]
Credit facility, available funds, percentage			80.00%
Maximum
Subsequent Event [Line Items]
Credit facility, available funds, percentage			85.00%
Subsequent Event \| WF Credit Agreement [Member]
Subsequent Event [Line Items]
Line of credit facility amount	$ 60,000
Credit facility outstanding balance	43
Subsequent Event \| Senior Secured Credit Facility \| Westlake Capital Finance, LLC [Member]
Subsequent Event [Line Items]
Line of credit facility amount	50,000
Minimum tangible net worth	$ 40,000
Amount of outstanding balance of credit facility	60.00%
Excess spread ratio	8.00%
Termination Fee Term	90 days
Subsequent Event \| Senior Secured Credit Facility \| Westlake Capital Finance, LLC [Member] \| Minimum
Subsequent Event [Line Items]
Credit facility, available funds, percentage	70.00%
Credit facility interest payment		$ 700
Subsequent Event \| Senior Secured Credit Facility \| Westlake Capital Finance, LLC [Member] \| Maximum
Subsequent Event [Line Items]
Credit facility, available funds, percentage	85.00%
Credit facility interest payment		$ 900