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Loss Per Share (Details Textual) - Restricted Shares Granted Pursuant to 2015 Plan [Member] - shares	12 Months Ended
	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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Unvested restricted shares.

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