XML 83 R71.htm IDEA: XBRL DOCUMENT
v3.21.1

Fair Value Measurements - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands |  | 1 Months Ended | 3 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Mar. 22, 2021 | Mar. 31, 2021 | Mar. 31, 2021 | Mar. 31, 2020 | Dec. 31, 2020
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Warrants term |  | 4 years 3 months 18 days | 4 years 3 months 18 days |  | 2 years 4 months 24 days
Cash settlements for interest rate swaps |  |  | $ 15,420 | $ 0 |
International lines of credit and other loans |  | $ 12,500 | $ 12,500 |  | $ 14,400
Minimum |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Change-in-control put feature |  |  | 1.00% |  |
Preferred stock remaining in future periods, probability percentage |  |  |  |  | 2.00%
Probability percentage of leverage ratio put being exercisable |  |  |  |  | 1.00%
Maximum |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Change-in-control put feature |  |  | 10.00% |  |
Preferred stock remaining in future periods, probability percentage |  |  |  |  | 3.00%
Probability percentage of leverage ratio put being exercisable |  |  |  |  | 10.00%
Interest Rate Swap |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Derivative, fixed interest rate |  |  |  |  | 2.4575%
Cash settlements for interest rate swaps | $ 13,700 |  |  |  |
Series B Preferred Stock |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Dividends withholdings net cash distribution |  | $ 3,000 |  |  |
Dividends withholdings offset from purchasers upon redemption |  |  | $ 1,000 |  |
Class of warrant or right, exercise price of warrants or rights (in dollars per share) |  |  |  |  | $ 12.00
Adjusted exercise price of warrants or rights (in dollars per share) |  | $ 11.49 | $ 11.49 |  |
Series D Preferred Stock |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Class of warrant or right, exercise price of warrants or rights (in dollars per share) | $ 0.01 |  |  |  |
Liquidation preference | 140.00% |  |  |  |

X
- Definition Class of Warrant or Right, Adjusted Exercise Price of Warrants or Rights + References No definition available. + Details
Name: | nnbr_ClassOfWarrantOrRightAdjustedExercisePriceOfWarrantsOrRights
Namespace Prefix: | nnbr_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition Preferred Stock, Change In Control Put Feature, Probability, Percentage + References No definition available. + Details
Name: | nnbr_PreferredStockChangeInControlPutFeatureProbabilityPercentage
Namespace Prefix: | nnbr_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Preferred Stock, Put Feature Exercisable, Probability Percentage + References No definition available. + Details
Name: | nnbr_PreferredStockPutFeatureExercisableProbabilityPercentage
Namespace Prefix: | nnbr_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Preferred Stock, Remaining In Future Periods, Probability Percentage + References No definition available. + Details
Name: | nnbr_PreferredStockRemainingInFuturePeriodsProbabilityPercentage
Namespace Prefix: | nnbr_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Temporary Equity, Dividends Withholdings Net Cash Distribution + References No definition available. + Details
Name: | nnbr_TemporaryEquityDividendsWithholdingsNetCashDistribution
Namespace Prefix: | nnbr_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Temporary Equity, Dividends Withholdings, Offset From Purchasers Upon Redemption + References No definition available. + Details
Name: | nnbr_TemporaryEquityDividendsWithholdingsOffsetFromPurchasersUponRedemption
Namespace Prefix: | nnbr_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Temporary Equity, Liquidation Preference, Percentage + References No definition available. + Details
Name: | nnbr_TemporaryEquityLiquidationPreferencePercentage
Namespace Prefix: | nnbr_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Exercise price per share or per unit of warrants or rights outstanding. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21475-112644 + Details
Name: | us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
Namespace Prefix: | us-gaap_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition Fixed interest rate related to the interest rate derivative. + References No definition available. + Details
Name: | us-gaap_DerivativeFixedInterestRate
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement. + 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(22)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(16)) -URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910 + Details
Name: | us-gaap_LineOfCredit
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The cash outflow for a financial contract that meets the hedge criteria as either a cash flow hedge, fair value hedge, or hedge of a net investment in a foreign operation. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3213-108585 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 27 -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3581-108585 + Details
Name: | us-gaap_PaymentsForHedgeInvestingActivities
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Period between issuance and expiration of outstanding warrant and right embodying unconditional obligation requiring redemption by transferring asset at specified or determinable date or upon event certain to occur, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb)(2) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 + Details
Name: | us-gaap_WarrantsAndRightsOutstandingTerm
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | instant

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

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

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=us-gaap_InterestRateSwapMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=us-gaap_SeriesBPreferredStockMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=us-gaap_SeriesDPreferredStockMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |