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Note 5 - Property and Equipment | 12 Months Ended
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Dec. 31, 2022
Notes to Financial Statements |
Property, Plant and Equipment Disclosure [Text Block] | 5. PROPERTY AND EQUIPMENT Property and equipment are comprised of the following:
|  | December 31, 2022 |  |  | January 1, 2022 |  |  | January 2, 2021 |
Computers and systems |  | $ | 4,077 |  |  | $ | 4,133 |  |  | $ | 4,686 |
Equipment and furniture |  |  | 220 |  |  |  | 86 |  |  |  | 264 |
Leasehold improvements |  |  | 267 |  |  |  | 159 |  |  |  | 236 |
Laboratory equipment |  |  | 67 |  |  |  | - |  |  |  | - |
|  |  | 4,630 |  |  |  | 4,378 |  |  |  | 5,185 |
Less: accumulated depreciation and amortization |  |  | 2,532 |  |  |  | 2,439 |  |  |  | 3,107 |
Property and equipment, net |  | $ | 2,098 |  |  | $ | 1,939 |  |  | $ | 2,078 |
The Company periodically writes off fully depreciated and amortized assets. The Company wrote off fully depreciated and amortized assets of $901, $1,671 and $1,529 during the fiscal years ended December 31, 2022, January 1, 2022 and January 2, 2021, respectively. In addition, $713 of assets not fully depreciated were included in the sale of the Canadian Power Systems business. For the fiscal years ended December 31, 2022, January 1, 2022 and January 2, 2021, depreciation and amortization expense for property and equipment was $995, $1,007 and $1,065, respectively.

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