Condensed Consolidated Balance Sheets [Parenthetical] - USD ($)	Jun. 30, 2018	Dec. 31, 2017
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized	100,000,000	100,000,000
Common stock, shares issued	30,975,206	28,516,009
Common stock, shares outstanding	30,975,206	28,516,009
Redeemable Series G convertible preferred stock [Member]
Temporary equity, par value (in dollars per share)	$ 0.01	$ 0.01
Temporary equity, shares authorized	1,000,000	1,000,000
Temporary equity, shares issued	168	168
Temporary equity, shares outstanding	168	168
Temporary equity, liquidation preference value	$ 168,496	$ 168,496

Face amount or stated value per share of common stock.

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