Preferred Stock (Series D Preferred Stock) (Narrative) (Details) - USD ($) $ / shares in Units, $ in Thousands		6 Months Ended
	Mar. 16, 2016	Jun. 30, 2016
Class of Stock [Line Items]
Preferred stock, partial redemption value		$ 30,000
Series D Preferred Stock [Member]
Class of Stock [Line Items]
Preferred stock, shares outstanding	6,245,156	6,245,156
Preferred stock, annual dividend rate	6.25%	6.25%
Preferred stock, face value	$ 10.00	$ 10.00
Percentage of voting stock	40.00%
Conversion price per share		$ 1.60
Debt instrument conversion ratio to common stock		6.25
Series D Preferred Stock [Member] | On Or Before March 16, 2019 [Member]
Class of Stock [Line Items]
Preferred stock, redemption price		$ 12.00
Series D Preferred Stock [Member] | March 16, 2019 to March 16, 2020 [Member]
Class of Stock [Line Items]
Preferred stock, redemption price		13.00
Series D Preferred Stock [Member] | On Or After March 16, 2020 [Member]
Class of Stock [Line Items]
Preferred stock, redemption price		14.00
Series D Preferred Stock [Member] | On March 31, 2021 [Member]
Class of Stock [Line Items]
Preferred stock, redemption price		$ 14.00
Aggregate outstanding shares required for liquidation election		40.00%
Series D Preferred Stock [Member] | After March 31, 2021 [Member]
Class of Stock [Line Items]
Preferred stock, annual dividend rate		12.50%
Minimum [Member] | Series D Preferred Stock [Member]
Class of Stock [Line Items]
Debt instrument conversion amount upon closing of qualified offering		$ 50,000
Maximum [Member]
Class of Stock [Line Items]
Debt instrument conversion amount upon closing of qualified offering		$ 75,000