Stockholders' Equity (Deficit) (Summary of Preferred Stock Terms) (Detail) (USD $)	0 Months Ended	3 Months Ended	12 Months Ended
	Mar. 15, 2014	Mar. 31, 2014	Dec. 31, 2013
Class of Stock [Line Items]
Preferred stock, Liquidation value		$ 2,871,000
Series A Convertible Preferred Stock [Member]
Class of Stock [Line Items]
Preferred stock, Liquidation value		212,625
Preferred stock, conversion Price		$ 103.034
Preferred stock, conversion Rate		0.04367%
Preferred stock, voting Rights		None
Preferred stock, dividends		0.00%
Preferred stock, conversion Period		Any time
Series B Convertible Preferred Stock [Member]
Class of Stock [Line Items]
Preferred stock, Liquidation value		375,000
Preferred stock, conversion Price		$ 10.00
Preferred stock, conversion Rate		0.40%
Preferred stock, voting Rights		None
Preferred stock, dividends		10.00%	10.00%
Preferred stock, conversion Period		Any time
Preferred stock, cumulative and undeclared dividends in arrears		491,000
Series C Convertible Preferred Stock [Member]
Class of Stock [Line Items]
Preferred stock, Liquidation value		115,000
Preferred stock, conversion Price		$ 6.00
Preferred stock, conversion Rate		0.50%
Preferred stock, voting Rights		None
Preferred stock, dividends		10.00%	10.00%
Preferred stock, conversion Period		Any time
Preferred stock, cumulative and undeclared dividends in arrears		143,000
Series D Convertible Preferred Stock [Member]
Class of Stock [Line Items]
Preferred stock, Liquidation value		525,000
Preferred stock, conversion Price		$ 10.00
Preferred stock, conversion Rate		1.00%
Preferred stock, voting Rights		None
Preferred stock, dividends	10.00%	10.00%	10.00%
Preferred stock, conversion Period		Any time
Preferred stock, cumulative and undeclared dividends in arrears		643,000
Series E Convertible Preferred Stock [Member]
Class of Stock [Line Items]
Preferred stock, Liquidation value		418,488
Preferred stock, conversion Price		$ 8.00
Preferred stock, conversion Rate		2.75%
Preferred stock, voting Rights		Equal in all respects to holders of common shares
Preferred stock, dividends		10.00%	10.00%
Preferred stock, conversion Period		Any time
Preferred stock, cumulative and undeclared dividends in arrears		$ 522,000