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Loss Per Share (Details Textual) - Restricted Shares Granted Pursuant to 2015 Plan [Member] - shares | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019
Income (Loss) Per Share (Textual) |  |
Vested restricted shares granted |  | 5,834
Unvested restricted shares | 938,837 | 1,505,833

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- References No definition available. + Details
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- Definition Unvested restricted shares. + References No definition available. + Details
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- Definition Vested restricted shares granted. + References No definition available. + Details
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- Details
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