Related party interest summary: (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Debt Disclosure [Abstract]
Interest expense, related parties	$ 199	$ 111	$ 560	$ 218
Accrued interest expense, related parties	$ 57	$ 39	$ 57	$ 39

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