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7. Stockholders' Equity (Details) - Common Stock $ / shares in Units, $ in Thousands | 1 Months Ended
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May 30, 2018 USD ($) $ / shares shares
Number of shares repurchased | shares | 1,190,420
Average price paid per share | $ / shares | $ 3.89
Approximate value of shares that may yet be purchased | $ | $ 15,366,000
Plan expiration date | Feb. 28, 2019

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