Preferred Stock (Summary of Preferred Stock Terms) (Detail) (USD $)			6 Months Ended
	Jun. 30, 2014	Dec. 31, 2013	Jun. 30, 2014 Series A Convertible Preferred Stock [Member]	Jun. 30, 2014 Series B Convertible Preferred Stock [Member]	Jun. 30, 2014 Series C Convertible Preferred Stock [Member]	Jun. 30, 2014 Series D Convertible Preferred Stock [Member]	Jun. 30, 2014 Series E Convertible Preferred Stock [Member]
Class of Stock [Line Items]
Preferred stock, Liquidation value	$ 2,871	$ 0	$ 212,625	$ 375,000	$ 115,000	$ 1,750,000	$ 418,488
Preferred stock, conversion Price			$ 103.034	$ 10.00	$ 6.00	$ 10.00	$ 8.00
Preferred stock, conversion Rate			0.04367%	0.40%	0.50%	1.00%	2.75%
Preferred stock, voting Rights			None	None	None	None	Equal in all respects to holders of common shares
Preferred stock, dividends			0.00%	10.00%	10.00%	10.00%	10.00%
Preferred stock, conversion Period			Any time	Any time	Any time	Any time	Any time
Preferred stock, cumulative and undeclared dividends in arrears				$ 501,000	$ 146,000	$ 630,000	$ 537,000