Label	Element	Value
Cumulative Effect, Period of Adoption, Adjustment [Member] \| Retained Earnings [Member]
Adjustment to Retained Earnings (Accumulated Deficit)	novn_AdjustmenttoRetainedEarningsAccumulatedDeficit	$ (714,000)

Adjustment to increase (decrease) the reporting entity's undistributed earnings or deficit.

No definition available.

Name:	novn_AdjustmenttoRetainedEarningsAccumulatedDeficit
Namespace Prefix:	novn_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant