Note 1 - Summary of Significant Accounting Policies (Details Textual) - USD ($) |
3 Months Ended | ||
|---|---|---|---|
Jan. 18, 2022 |
Mar. 31, 2022 |
Mar. 31, 2021 |
|
| Proceeds from Issuance of Common Stock | $ 49,440,000 | $ 0 | |
| Subscription Offering [Member] | |||
| Stock Issued During Period, Shares, New Issues (in shares) | 5,290,000 | ||
| Shares Issued, Price Per Share (in dollars per share) | $ 10.00 | ||
| Proceeds from Issuance of Common Stock | $ 53,000,000.0 | ||
| Subscription Offering [Member] | NSTS Charitable Foundation [Member] | |||
| Payments of Charitable Contributions | $ 150,000 | ||
| Subscription Offering [Member] | NSTS Charitable Foundation [Member] | Contribution of Nonmonetary Assets to Charitable Organization [Member] | |||
| Stock Issued During Period, Shares, New Issues (in shares) | 107,959 | ||
| X | ||||||||||
- Definition The amount of cash outflow for charitable contributions. No definition available.
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| X | ||||||||||
- Definition The cash inflow from the additional capital contribution to the entity. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Per share or per unit amount of equity securities issued. No definition available.
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| X | ||||||||||
- Definition Number of new stock issued during the period. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Details
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| X | ||||||||||
- Details
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| X | ||||||||||
- Details
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