Summary of significant accounting policies (Details - Changes in Level 3 financial instruments) - Fair Value, Inputs, Level 3 [Member] - USD ($) |
6 Months Ended | |
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Jun. 30, 2026 |
Dec. 31, 2025 |
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| Warrants Investment [Member] | ||
| Debt Securities, Held-to-Maturity, Allowance for Credit Loss [Line Items] | ||
| Assets, fair value | $ 780,000 | $ 685,000 |
| Purchases, issuances and settlements | 0 | |
| Change in fair value | 95,000 | |
| Rotor Lab Contingent Consideration [Member] | ||
| Debt Securities, Held-to-Maturity, Allowance for Credit Loss [Line Items] | ||
| Assets, fair value | 3,000,000 | $ 2,847,000 |
| Purchases, issuances and settlements | 0 | |
| Change in fair value | $ 153,000 |
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- 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. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of increase (decrease) of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount of purchases, (sales), issuances and (settlements) of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Fair value of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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