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Shareholders' Equity (Details) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended | 9 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | ---
Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020 | Jun. 30, 2021 | May 31, 2021 | Dec. 31, 2020 | Apr. 03, 2018
Value of shares issued |  | $ 6,874 |  | $ 18,774 |  |  |  |
Cash dividend rate declared, per common share | $ 0.01 |  | $ 0.03 |  |  |  |  |
Common Stock, Dividends, Per Share, Declared and Paid |  | $ 0.01 |  | $ 0.03 |  |  |  |
Dividends paid | $ 700 | $ 700 | $ 2,500 | $ 2,100 |  |  |  |
Common stock, shares authorized | 200,000,000 |  | 200,000,000 |  | 200,000,000 | 100,000,000 | 200,000,000 |
Common stock, par value | $ 0.001 |  | $ 0.001 |  |  |  | $ 0.001 |
ATM Agreement |  |  |  |  |  |  |  |
Sale of shares | 0 | 1,705,323 | 0 | 6,039,823 |  |  |  |
Value of shares issued |  | $ 6,800 |  | $ 18,700 |  |  |  |
Maximum | ATM Agreement |  |  |  |  |  |  |  |
Common stock aggregate gross sales price |  |  |  |  |  |  |  | $ 75,000

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