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8. Intangible Assets (Tables) | 6 Months Ended
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Jun. 30, 2020
Goodwill and Intangible Assets Disclosure [Abstract] |
Intangible assets |
|  | June 30, 2020 |  |  | December 31, 2019 |
Customer relationships |  | $ | 1,171 |  |  | $ | 1,292 |
Less: accumulated amortization |  |  | (873 | ) |  |  | (827 | )
Total |  | $ | 298 |  |  | $ | 465 |

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