Net Income (Loss) per Share (Details) - Schedule of diluted net loss per share - shares shares in Thousands	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Schedule of diluted net loss per share [Abstract]
Stock options	54	4,329	15,200
Warrants	125

Number of shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period.

No definition available.

Name:	negg_StockOption
Namespace Prefix:	negg_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration