Quarterly report pursuant to sections 13 or 15(d)

Preferred Stock - Additional Information (Detail)

Preferred Stock - Additional Information (Detail) (USD $)	1 Months Ended	3 Months Ended		12 Months Ended		1 Months Ended		3 Months Ended	12 Months Ended	1 Months Ended		12 Months Ended		1 Months Ended	3 Months Ended				1 Months Ended	3 Months Ended	12 Months Ended	3 Months Ended		1 Months Ended	3 Months Ended	12 Months Ended
	Sep. 12, 2012	Mar. 31, 2014	Dec. 31, 2012	Dec. 31, 2013	Sep. 25, 2012	Sep. 12, 2012 Series B	Dec. 20, 2012 Series C Convertible Preferred Stock	Mar. 31, 2014 Series C Convertible Preferred Stock	Dec. 31, 2013 Series C Convertible Preferred Stock	Dec. 20, 2012 Series C Convertible Preferred Stock Period 3	Dec. 20, 2012 Series C Convertible Preferred Stock Period 4	Dec. 31, 2012 Series B Preferred Stock	Mar. 31, 2014 Series B Preferred Stock	May 15, 2013 Series D Convertible Preferred Stock	Mar. 31, 2013 Series D Convertible Preferred Stock	Mar. 31, 2014 Series D Convertible Preferred Stock	Dec. 31, 2013 Series D Convertible Preferred Stock	Dec. 20, 2012 Series D Convertible Preferred Stock	Feb. 21, 2013 Series E Convertible Preferred Stock	Mar. 31, 2014 Series E Convertible Preferred Stock	Dec. 31, 2013 Series E Convertible Preferred Stock	Mar. 31, 2014 Series E Convertible Preferred Stock After Trigger Date	Mar. 31, 2014 Series E Convertible Preferred Stock Scenario 2	Aug. 22, 2013 Series F Convertible Preferred Stock	Mar. 31, 2014 Series F Convertible Preferred Stock	Dec. 31, 2013 Series F Convertible Preferred Stock
Preferred Stock [Line Items]
Preferred stock authorized to issue		5,000,000						25,000	25,000				1,000,000			13,000
Preferred stock , Par value								$ 0.001	$ 0.001				$ 0.001			$ 0.001
Proceeds from issuance of convertible preferred stock						$ 6,000,000	$ 10,000,000					$ 5,195,000							$ 5,000,000					$ 5,000,000
Preferred stock, issued	600,000							10,000	10,000
Conversion price per share	$ 0.13						$ 0.6889							$ 0.6959					$ 1.17					$ 4.5881
Convertible Preferred Stock, Total Shares Issued Upon Conversion	46,153,846
Ownership Percentage	73.00%
Convertible stock, Conversion of preferred stock			599,998											11,915
Convertible stock, Conversion of convertible securities			46,153,692											1,712,167
Liquidation preference per share	$ 10						$ 1,000											$ 100	$ 1,000					$ 1,000
Common stock price in increased rate					$ 0.59
Preferred stock issued due to investment agreement							10,000											11,177	5,000					5,000
Preferred stock conversion as a percentage its stated value in an event of a change in control or a merger or recapitalization										150.00%	125.00%
Preferred stock conversion, trading price as percentage of conversion price							200.00%
Preferred stock conversion, number of trading days							20 days
Preferred stock conversion, number of immediate preceding consecutive trading days							30 days
Preferred stock, cumulative dividends rate								10.00%												5.00%					7.00%
Preferred stock, stated value for cumulative dividends								$ 1,000
Preferred stock, dividends accrued								250,000	1,014,000
Merger agreement, number of shares issued															738
Preferred stock, outstanding								10,000	10,000							0	0
Convertible redeemable preferred stock, shares authorized																				10,000					10,000
Convertible redeemable preferred stock, par value																				$ 0.001					$ 0.001
Preferred stock redemption price as percentage of liquidation preference																						110.00%	105.00%
Accrual of dividends on convertible preferred stock		400,000		1,360,000																63,000	218,000				87,000	129,000
Preferred stock redemption price additional amount with liquidation preference																									$ 100,000