Redeemable Convertible Preferred Stock (Schedule of Conversions of Series B to Common Stock) (Details) - Series B Convertible Preferred Stock [Member] - USD ($)							12 Months Ended
		Aug. 13, 2015	Jul. 16, 2015	May. 11, 2015	May. 04, 2015	Apr. 08, 2015	Dec. 31, 2015
Number of shares converted		500,000	262,500	250,000	23,587	107,100	1,143,187
Shares of common stock issued upon conversion of preferred stock		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

[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.