Net Income (Loss) Per Common Share - Additional Information (Detail)	3 Months Ended
Jun. 30, 2023 $ / 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.

Name:	nnbr_AntiDilutiveSecuritiesExcludedFromComputationOfEarningsPerShareMaximumPriceRangeOne
Namespace Prefix:	nnbr_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	duration