Additional disclosures for options granted for all years presented: (Details) - Share-Based Payment Arrangement, Option [Member]	12 Months Ended
Dec. 31, 2022	Dec. 31, 2021
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Vesting period (years) of shares granted in period	3 years	3 years
Contractual life (years) of shares granted in period	7 years	7 years
Estimated forfeitures	4.00%	4.00%

The element represents share based compensation arrangement by share based payment award award contractual life.

No definition available.

Name:	nanx_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardContractualLife
Namespace Prefix:	nanx_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

The element represents share based compensation arrangement by share based payment award fair value assumptions fortfeiture rate.

+ References

No definition available.

+ Details

Name:	nanx_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsFortfeitureRate
Namespace Prefix:	nanx_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)(1)
-URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_AwardTypeAxis=us-gaap_EmployeeStockOptionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: