Discontinued Operations - Schedule of Cash Flow Information Related to Discontinued Operation (Detail) - USD ($) |
6 Months Ended | |
|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
|
| Significant non-cash operating activities: | ||
| Impairment charges | $ 0 | $ 7,362 |
| Discontinued Operations [Member] | ||
| Significant non-cash operating activities: | ||
| Depreciation and amortization | 11,000 | 304,000 |
| Provision for severance benefits | 19,000 | (243,000) |
| Stock-based compensation | 0 | (353,000) |
| Impairment charges | 0 | 7,362,000 |
| Investing activities: | ||
| Capital expenditures | $ 0 | $ 0 |