Related party interest summary: (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2023	Mar. 31, 2022
Debt Disclosure [Abstract]
Interest expense, related parties	$ 150	$ 39
Accrued interest expense, related parties	$ 59	$ 16

Amount of accrued interest expense related parties.

No definition available.

Name:	nanx_AccruedInterestExpenseRelatedParties
Namespace Prefix:	nanx_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration