XML 31 R52.htm IDEA: XBRL DOCUMENT
v2.4.1.9

Interest Rate Swap Agreements (Detail Textuals) (Interest Rate Swap, USD $) | 0 Months Ended | 1 Months Ended |
--- | --- | --- | ---
Jun. 04, 2012 | Jul. 30, 2012 | Mar. 31, 2015 Swap
Interest Rate Swap |  |  |
Derivatives, Fair Value [Line Items] |  |  |
Number of interest rate swap agreements |  |  | 2 us-gaap_NumberOfInterestRateDerivativesHeld / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_InterestRateSwapMember
Fixed rate paid | 1.00%nick_DerivativeAverageFixedInterestRatePaid / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_InterestRateSwapMember | 0.87%nick_DerivativeAverageFixedInterestRatePaid / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_InterestRateSwapMember |
Interest rate swap period | 5 years | 5 years |
Description of rate for the variable rate of the interest rate | 1-month LIBOR rate | 1-month LIBOR rate |
Derivative notional amount | $ 25,000,000 invest_DerivativeNotionalAmount / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_InterestRateSwapMember | $ 25,000,000 invest_DerivativeNotionalAmount / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_InterestRateSwapMember |

X
- Definition Aggregate notional amount specified by the derivative(s). Expressed as an absolute value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 12 -Section 13 -Sentence Column B + Details
Name: | invest_DerivativeNotionalAmount
Namespace Prefix: | invest_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | instant

X
- Definition Average fixed interest rate related to the group of interest rate derivatives. + References No definition available. + Details
Name: | nick_DerivativeAverageFixedInterestRatePaid
Namespace Prefix: | nick_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition The reference rate for the variable rate of the interest rate derivative, such as LIBOR or the US Treasury rate and the maturity of the reference rate used, such as three months or six months LIBOR. + References No definition available. + Details
Name: | nick_DescriptionOfDerivativeVariableRateBasis
Namespace Prefix: | nick_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_DerivativesFairValueLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Period the derivative contract is outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
Name: | us-gaap_DerivativeTermOfContract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of interest rate derivative instruments held by the entity at the reporting date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1B -URI http://asc.fasb.org/extlink&oid=35706170&loc=SL5580258-113959 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=35706170&loc=SL5579245-113959 + Details
Name: | us-gaap_NumberOfInterestRateDerivativesHeld
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant