| Inventories (Details) | Dec. 31, 2024  USD ($) | 
|---|---|
| Inventories | |
| Raw materials | $ 7,236,000 | 
| Work in progress | 84,000 | 
| Total inventory, net | 7,320,000 | 
| Gross value of pre-launch inventory held but not recognized | 7,103,000 | 
| Amount of recognized asset relating to pre-purchases of raw materials that are still under production and have not yet been delivered. | $ 1,865,000 | 
| X | ||||||||||
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- Definition Gross value of pre-launch inventory held but not recognized. No definition available. 
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| X | ||||||||||
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- Definition Recognized asset relating to pre-purchases of raw materials that are still under production and have not yet been delivered. No definition available. 
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| X | ||||||||||
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- References No definition available. 
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| X | ||||||||||
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- Definition Amount after valuation and LIFO reserves of inventory expected to be sold, or consumed within one year or operating cycle, if longer. Reference 1: http://www.xbrl.org/2003/role/exampleRef 
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| X | ||||||||||
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- Definition Gross amount of unprocessed materials to be used in manufacturing or production process and supplies that will be consumed. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef 
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| X | ||||||||||
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- Definition Amount before valuation and LIFO reserves of merchandise or goods in the production process expected to be completed within one year or operating cycle, if longer. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef 
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