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Note 6 - Property and Equipment | 12 Months Ended
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Dec. 31, 2021
Notes to Financial Statements |
Property, Plant and Equipment Disclosure [Text Block] | 6. Property and Equipment Property and equipment is stated at cost and consists of the following:
|  | December 31, |
|  | 2021 |  |  | 2020 |
Equipment and software |  | $ | 48,804 |  |  | $ | 48,316 |
Furniture and fixtures |  |  | 2,389 |  |  |  | 2,496 |
Leasehold improvements |  |  | 34,614 |  |  |  | 34,056 |
Construction in progress |  |  | 1,378 |  |  |  | 432 |
Subtotal |  |  | 87,185 |  |  |  | 85,300 |
Less accumulated depreciation |  |  | (39,583 | ) |  |  | (34,687 | )
Total |  | $ | 47,602 |  |  | $ | 50,613 |
Depreciation expense was $6.5 million, $6.1 million, and $5.0 million for the years ended December 31, 2021, 2020, and 2019, respectively.

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