Details of Certain Financial Statement Components - Property, plant and equipment, net (Details) - USD ($) |
3 Months Ended | 6 Months Ended | |||
|---|---|---|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
Jun. 30, 2026 |
Jun. 30, 2025 |
Dec. 31, 2025 |
|
| Property, plant and equipment, net | |||||
| Property, plant and equipment, gross | $ 2,788,000 | $ 2,788,000 | $ 2,770,000 | ||
| Less: accumulated depreciation | (2,409,000) | (2,409,000) | (2,296,000) | ||
| Total property, plant and equipment, net | 379,000 | 379,000 | 474,000 | ||
| Depreciation expense | 45,000 | $ 48,000 | 92,000 | $ 95,000 | |
| Furniture, machinery and equipment | |||||
| Property, plant and equipment, net | |||||
| Property, plant and equipment, gross | 2,253,000 | 2,253,000 | 2,243,000 | ||
| Leasehold improvements | |||||
| Property, plant and equipment, net | |||||
| Property, plant and equipment, gross | $ 535,000 | $ 535,000 | $ 527,000 | ||
| X | ||||||||||
- Definition Amount of accumulated depreciation, depletion, and amortization of property, plant, and equipment. Includes, but is not limited to, land and land improvement; building; machinery and equipment; furniture and fixture; and work of art, historical treasure, or similar asset classified as collection. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition Amount, before accumulated depreciation, depletion, and amortization, of property, plant, and equipment. Includes, but is not limited to, land and land improvement; building; machinery and equipment; furniture and fixture; and work of art, historical treasure, or similar asset classified as collection. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- 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/2009/role/commonPracticeRef
|
| X | ||||||||||
- Definition Amount, after accumulated depreciation, depletion, and amortization, of property, plant, and equipment. Includes, but is not limited to, land and land improvement; building; machinery and equipment; furniture and fixture; and work of art, historical treasure, or similar asset classified as collection. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|