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8. Stockholders' Equity (Details) | 12 Months Ended
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Dec. 31, 2020 USD ($) $ / shares shares
Total shares purchased | 23,638
Total number of shares purchased as part of publicly announced plan | 23,638
July 2020 |
Total shares purchased | 675
Average price per share | $ / shares | $ 6.21
Total number of shares purchased as part of publicly announced plan | 675
Approximate dollar value of shares that may be purchased under the plan | $ | $ 1,200,000
August 2020 |
Total shares purchased | 22,963
Average price per share | $ / shares | $ 6.20
Total number of shares purchased as part of publicly announced plan | 22,963
Approximate dollar value of shares that may be purchased under the plan | $ | $ 1,000,000

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