Related party interest summary: (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Debt Disclosure [Abstract]
Interest expense, related parties	$ 211	$ 68	$ 361	$ 107
Accrued interest expense, related parties	$ 78	$ 29	$ 78	$ 29

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