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Note 7 - Employee Retention Credit (Details Textual) - USD ($) $ in Thousands | Sep. 30, 2023 | Dec. 31, 2022
--- | --- | ---
Employee Retention Credit Receivable | $ 0 | $ 2,650 | [1]
[1] | The balance sheet at December 31, 2022 has been derived from the audited financial statements at that date

X
- Definition Amount of employee retention credit receivable. + References No definition available. + Details
Name: | nsys_EmployeeRetentionCreditReceivable
Namespace Prefix: | nsys_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant