Note 2 - Property and Equipment - Summary of Property and Equipment (Details) - USD ($) |
Jun. 30, 2025 |
Dec. 31, 2024 |
|---|---|---|
| Property and equipment, gross | $ 73,799,000 | $ 72,854,000 |
| Accumulated depreciation | (40,772,000) | (41,729,000) |
| Net property and equipment | 33,027,000 | 31,125,000 |
| Non-US [Member] | ||
| Net property and equipment | 7,857,000 | 6,104,000 |
| Medical Equipment and Facilities [Member] | ||
| Property and equipment, gross | 70,289,000 | 71,148,000 |
| Office Equipment [Member] | ||
| Property and equipment, gross | 562,000 | 594,000 |
| Construction in Progress [Member] | ||
| Property and equipment, gross | $ 2,948,000 | $ 1,112,000 |