Quarterly report pursuant to Section 13 or 15(d)

Preferred Stock - Additional Information (Detail)

Preferred Stock - Additional Information (Detail) (USD $)	0 Months Ended	3 Months Ended	6 Months Ended	12 Months Ended			0 Months Ended	12 Months Ended		0 Months Ended	6 Months Ended	12 Months Ended		0 Months Ended			3 Months Ended			0 Months Ended	6 Months Ended	12 Months Ended		6 Months Ended		0 Months Ended		6 Months Ended	12 Months Ended		0 Months Ended	6 Months Ended	0 Months Ended
	Sep. 12, 2012	Dec. 31, 2012	Jun. 30, 2014	Dec. 31, 2013	Sep. 25, 2012	Sep. 12, 2012	Sep. 12, 2012 Series B	Dec. 31, 2012 Series B Preferred Stock	Jun. 30, 2014 Series B Preferred Stock	Dec. 20, 2012 Series C Convertible Preferred Stock	Jun. 30, 2014 Series C Convertible Preferred Stock	Dec. 31, 2013 Series C Convertible Preferred Stock	Dec. 20, 2012 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	May 15, 2013 Series D Convertible Preferred Stock	Mar. 31, 2013 Series D Convertible Preferred Stock	Jun. 30, 2014 Series D Convertible Preferred Stock	Dec. 20, 2012 Series D Convertible Preferred Stock	Feb. 21, 2013 Series E Convertible Preferred Stock	Jun. 30, 2014 Series E Convertible Preferred Stock	Dec. 31, 2013 Series E Convertible Preferred Stock	Feb. 21, 2013 Series E Convertible Preferred Stock	Jun. 30, 2014 Series E Convertible Preferred Stock After Trigger Date	Jun. 30, 2014 Series E Convertible Preferred Stock Scenario 2	Jun. 30, 2014 Series F Convertible Preferred Stock	Aug. 22, 2013 Series F Convertible Preferred Stock	Jun. 30, 2014 Series F Convertible Preferred Stock	Dec. 31, 2013 Series F Convertible Preferred Stock	Aug. 22, 2013 Series F Convertible Preferred Stock	Jun. 30, 2014 Series G Redeemable Convertible Preferred Stock	Jun. 30, 2014 Series G Redeemable Convertible Preferred Stock	Jun. 30, 2014 Series G Redeemable Convertible Preferred Stock Dated April 17, 2014	Jun. 30, 2014 Series G Redeemable Convertible Preferred Stock Dated February 25, 2014
Preferred Stock [Line Items]
Preferred stock authorized to issue			5,000,000						1,000,000		25,000	25,000						13,000
Preferred stock , Par value									$ 0.001		$ 0.001	$ 0.001						$ 0.001
Proceeds from issuance of convertible preferred stock							$ 6,000,000	$ 5,195,000		$ 10,000,000										$ 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					$ 2.30
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															5,404
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%				9.00%
Preferred stock, stated value for cumulative dividends											$ 1,000
Preferred stock, dividends accrued											502,000	1,014,000
Merger agreement, number of shares issued																	738
Convertible redeemable preferred stock, shares authorized																					10,000							10,000				18,000
Convertible redeemable preferred stock, par value																					$ 0.001							$ 0.001				$ 0.001
Preferred stock redemption price as percentage of liquidation preference																								110.00%	105.00%
Accrual of dividends on convertible preferred stock			804,000	1,360,000																	126,000	218,000						176,000	129,000
Preferred stock redemption price additional amount with liquidation preference																												100,000
Debt exchanged with stock, shares																																	10,956	1,640
Debt exchanged with stock, amount																																	10,956	1,640,085
Exchange agreement, shares received																										5,000
Temporary equity liquidation preference per share																																$ 1,000
Redemption price added to liquidation Preference per share																																900,000
Market value of preferred stock exchanged																																18,400,000
Charge recorded in additional paid capital for difference between fair value and stated value																																$ 400,000