Inventories (Details Narrative) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
Mar. 31, 2018	Dec. 31, 2017
Inventory Disclosure [Abstract]
Relassification from prepaid expenses to raw materials	$ 246	$ 192

The amount reclassified from prepaid expenses to raw materials during period.

No definition available.

Name:	nanx_RelassificationFromPrepaidExpensesToRawMaterials
Namespace Prefix:	nanx_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration