Redeemable Convertible Preferred Stock (Details)								12 Months Ended
		Aug. 13, 2015 USD ($) shares	Aug. 03, 2015	Jul. 16, 2015 USD ($) shares	May. 11, 2015 USD ($) shares	May. 04, 2015 USD ($) shares	Apr. 08, 2015 USD ($) shares	Dec. 31, 2015 USD ($) $ / shares shares	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($) $ / shares shares
Class of Stock [Line Items]
Change in fair value of Preferred B stock derivative liability								$ 9,330,000	$ 27,764,000
Preferred B stock conversion liability								1,493,000	12,320,000
Amount reclassified to Series B redeemable convertible stock								$ (8,971,000)
Reverse stock split, description			1-for-50 (1:50) reverse stock split of its common stock, par value $0.01 per share
Conversion ratio of reverse stock split			50
Series B Convertible Preferred Stock [Member]
Class of Stock [Line Items]
Preferred stock, shares authorized | shares										10,000,000
Preferred Stock, initial stated value per share | $ / shares										$ 1.40
Preferred Stock, par value per share | $ / shares										$ 0.01
Number of common stock shares into which each share of preferred stock can be converted										0.20
Proceeds from conversion of Series B convertible stock										$ 7,000,000
Preferred Stock dividend rate								10.00%
Trigger price per share for redemption and conversion features of embedded derivative | $ / shares								$ 7.00
Number of shares converted | shares		500,000		262,500	250,000	23,587	107,100	1,143,187
Shares of common stock issued upon conversion of preferred stock | shares		100,000		52,500	50,000	4,717	21,420	228,637
Amount reclassified from Series B derivative liability into shareholders' equity	[1]	$ 543,000		$ 318,000	$ 381,000	$ 36,000	$ 219,000	$ 1,497,000
Change in fair value of Preferred B stock derivative liability								9,330,000	$ 27,760,000
Preferred B stock conversion liability								1,493,000
Amount reclassified to Series B redeemable convertible stock								8,971,000
Dividends payable								$ 368,000

[1] Not inclusive of $9,000 reclassified from Series B redeemable convertible preferred stock and liabilities for dividends payable of $368,000 upon conversion of these shares.