XML 57 R45.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Segment Information - Additional Information (Detail) - USD ($) $ in Thousands | 3 Months Ended | 5 Months Ended | 9 Months Ended
--- | --- | --- | ---
Sep. 30, 2018 | Sep. 30, 2017 | Sep. 30, 2018 | Sep. 30, 2018 | Sep. 30, 2017
Segment Reporting Information [Line Items] |  |  |  |  |
Income (loss) from operations | $ 5,881 | $ 5,551 |  | $ 9,283 | $ 32,045
Paragon Medical Inc |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Sales revenue |  |  | $ 70,000 |  |
Income (loss) from operations |  |  | 2,200 |  |
Bridgemedica, LLC |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Sales revenue |  |  | 7,300 |  |
Income (loss) from operations |  |  | $ 200 |  |

X
- Definition The net result for the period of deducting operating expenses from operating revenues. + References No definition available. + Details
Name: | us-gaap_OperatingIncomeLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Aggregate revenue during the period from the sale of goods in the normal course of business, after deducting returns, allowances and discounts. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1(a)) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + Details
Name: | us-gaap_SalesRevenueGoodsNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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_SegmentReportingInformationLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=nnbr_ParagonMedicalIncMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=nnbr_BridgemedicaLLCMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |