Note 7 - Select Balance Sheet and Statement of Operations Information (Tables)
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12 Months Ended |
Dec. 31, 2022 |
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| Notes Tables |
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| Schedule of Inventory, Current [Table Text Block] |
| | | December 31, | |
| | | 2022 | | | 2021 | |
| Raw materials | | $ | 2,478 | | | $ | 2,368 | |
| Work-in-progress | | | 2,112 | | | | 1,649 | |
| Finished goods | | | 19,316 | | | | 16,526 | |
| Total inventory | | $ | 23,906 | | | $ | 20,543 | |
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| Property, Plant and Equipment [Table Text Block] |
| | | | | | December 31, | |
| | | Useful Lives (in years) | | | 2022 | | | 2021 | |
| Lab equipment tooling and molds | | 4 – 10 | | | $ | 4,356 | | | $ | 8,194 | |
| Office furniture and equipment | | 6 – 10 | | | | 1,240 | | | | 1,743 | |
| Leasehold improvements | | up to 10 | | | | 794 | | | | 1,839 | |
| Computers and software | | 3 | | | | 906 | | | | 1,939 | |
| Vehicles | | 5 – 7 | | | | 37 | | | | 37 | |
| Demo units | | 5 | | | | 214 | | | | 114 | |
| Total property and equipment | | | | | | 7,547 | | | | 13,866 | |
| Less: Accumulated depreciation | | | | | | (5,690 | ) | | | (11,197 | ) |
| Total property and equipment, net | | | | | $ | 1,857 | | | $ | 2,669 | |
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| Schedule of Other Current Assets [Table Text Block] |
| | | December 31, | |
| | | 2022 | | | 2021 | |
| Government remittances (1) | | $ | 1,602 | | | $ | 1,322 | |
| Consideration receivable from subsidiaries sale | | | 629 | | | | 1,405 | |
| Deferred financing costs | | | 301 | | | | 223 | |
| Sundry assets and miscellaneous | | | 1,170 | | | | 808 | |
| Total other current assets | | $ | 3,702 | | | $ | 3,758 | |
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| Schedule of Accrued Expenses and Other Current Liabilities [Table Text Block] |
| | | December 31, | |
| | | 2022 | | | 2021 | |
| Payroll and related expense | | $ | 2,244 | | | $ | 1,770 | |
| Accrued expenses | | | 5,045 | | | | 6,584 | |
| Commission accrual | | | 3,761 | | | | 4,529 | |
| Sales and consumption taxes | | | 5,617 | | | | 6,629 | |
| Total accrued expenses and other current liabilities | | $ | 16,667 | | | $ | 19,512 | |
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| Schedule of Product Warranty Liability [Table Text Block] |
| | | December 31, | |
| | | 2022 | | | 2021 | |
| Balance as of the beginning of the year | | $ | 1,753 | | | $ | 1,639 | |
| Warranties issued during the year | | | 993 | | | | 1,231 | |
| Warranty costs incurred during the year | | | (1,264 | ) | | | (1,117 | ) |
| Balance at the end of the year | | $ | 1,482 | | | $ | 1,753 | |
| Current | | | 1,074 | | | | 1,245 | |
| Long-term | | | 408 | | | | 508 | |
| Total | | $ | 1,482 | | | $ | 1,753 | |
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| Schedule of Finance Expenses [Table Text Block] |
| | | December 31, | |
| | | 2022 | | | 2021 | |
| Interest expense | | $ | 4,297 | | | $ | 3,720 | |
| Accretion on long-term debt and amortization of fees | | | 264 | | | | 1,235 | |
| Total finance expenses | | $ | 4,561 | | | $ | 4,955 | |
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