Loss per Share (Details) - Series C Convertible Preferred Stock [Member] - USD ($)	3 Months Ended	9 Months Ended
Sep. 30, 2019	Sep. 30, 2019	Dec. 31, 2018	Sep. 30, 2018
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Preferred stock conversion price (in dollars per share)	$ 39.93	$ 39.93
Preferred stock conversion price reduced (in dollars per share)	$ 7.50	$ 7.50
Dividend Paid [Member]
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Dividends payable	$ 554,000	$ 554,000	$ 2,500,000	$ 2,500,000

Carrying value as of the balance sheet date of dividends declared but unpaid on equity securities issued by the entity and outstanding.

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