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v3.26.1

Note 1 - Summary of Significant Accounting Policies (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2025
Notes Tables |
Property, Plant and Equipment Useful Life [Table Text Block] |
|  | Years |
Land improvements |  |  | 3 - 10 |
Office building and improvements |  |  | 10 - 40 |
Furniture and equipment |  |  | 3 - 10 |

X
- Definition Tabular disclosure of property, plant and equipment. + References No definition available. + Details
Name: | nsts_PropertyPlantAndEquipmentUsefulLifeTableTextBlock
Namespace Prefix: | nsts_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

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- References No definition available. + Details
Name: | us-gaap_TableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration