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Note 5 - Balance Sheet Information (Tables) | 12 Months Ended
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Dec. 31, 2020
Notes Tables |
Schedule of Inventory, Current [Table Text Block] |
|  | December 31, |
(in thousands) |  | 2020 |  |  | 2019 |
Finished goods |  | $ | 4,938 |  |  | $ | 5,561 |
Work in process |  |  | 3,513 |  |  |  | 3,153 |
Raw materials |  |  | 13,811 |  |  |  | 13,347 |
Total |  | $ | 22,262 |  |  | $ | 22,061 |
Other Current Liabilities [Table Text Block] |
|  | December 31, |
(in thousands) |  | 2020 |  |  | 2019 |
Compensation |  | $ | 3,715 |  |  |  | 2,554 |
Professional fees |  |  | 432 |  |  |  | 395 |
Warranty costs |  |  | 185 |  |  |  | 252 |
Customer related costs |  |  | 1,093 |  |  |  | 963 |
Interest |  |  | 46 |  |  |  | 425 |
Accrued income taxes |  |  | 286 |  |  |  | 609 |
Other |  |  | 1,721 |  |  |  | 1,502 |
Total |  | $ | 7,478 |  |  | $ | 6,700 |
Property, Plant and Equipment [Table Text Block] |
|  | December 31, |
(in thousands) |  | 2020 |  |  | 2019 |
Machinery and equipment |  | $ | 7,450 |  |  | $ | 7,198 |
Computer equipment and software |  |  | 9,114 |  |  |  | 8,954 |
Leasehold improvements |  |  | 2,540 |  |  |  | 2,151 |
Furniture and fixtures |  |  | 1,353 |  |  |  | 1,321 |
Automobiles |  |  | 100 |  |  |  | 92 |
|  |  | 20,557 |  |  |  | 19,716 |
Less: accumulated depreciation |  |  | (16,597 | ) |  |  | (14,940 | )
Property, plant and equipment, net |  | $ | 3,960 |  |  | $ | 4,776 |

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