KNOW Bio Technology Agreement - Additional Information (Details) - USD ($)	12 Months Ended
Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Milestone and royalty payments	$ 0	$ 0	$ 0

The amount of cash paid for royalties and milestone during the current period.

No definition available.

Name:	novn_PaymentsForRoyaltyAndMilestone
Namespace Prefix:	novn_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration