Net Income (Loss) Per Common Share - Additional Information (Detail)	9 Months Ended
Sep. 30, 2024 $ / shares
Earnings Per Share [Abstract]
Antidilutive securities excluded from computation of earnings per share, minimum price range (in dollars per share)	$ 7.93
Anti dilutive securities excluded from computation of earnings per share, maximum price range (in dollars per share)	$ 25.16

Antidilutive securities excluded from computation of earnings per share maximum price range one.

No definition available.

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Namespace Prefix:	nnbr_
Data Type:	dtr-types1:perShareItemType
Balance Type:	na
Period Type:	duration