Subsequent Event - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Millions	1 Months Ended
	Jul. 31, 2016	Jul. 21, 2016	May 31, 2016	Mar. 31, 2016	Jan. 21, 2016	Jun. 30, 2016	Dec. 31, 2015
Subsequent Event [Line Items]
Stock Issued During Period, Shares, New Issues				467,392
Preferred Stock, Par or Stated Value Per Share						$ 0.001	$ 0.001
Convertible Preferred Stock, Terms of Conversion					(a) the conversion price then in effect or (b) 65% of the volume weighted average price of the Companys common stock for ten consecutive days prior to the applicable conversion date.
Preferred Stock, Redemption Terms			(i) on or prior to August 11, 2016, in an amount equal to 120% of the aggregate stated value then outstanding, and (ii) after August 11, 2016, in an amount equal to 135% of the aggregate stated value then outstanding		(i) on or prior to March 26, 2016, in an amount equal to 126% of the aggregate stated value then outstanding, (ii) after March 26, 2016 and on or prior to July 26, 2016, in an amount equal to 144% of the aggregate stated value then outstanding and (iii) after July 26, 2016, in an amount equal to 150% of the aggregate stated value then outstanding.
Percentage of Investors Subscription Amount					85.00%
Conversion of Stock, Description					the conversion of the Series C Preferred Stock in excess of 19.99% of the outstanding Common Stock and the removal of the Adjustment Floor within 120 days of the execution of the Purchase Agreement (the Shareholder Approval). The Company obtained Shareholder Approval on June 28, 2016. Additionally, until the Series C Preferred Stock is no longer outstanding, the Series C Investors may participate in future offerings for up to 50% of the amount of such offerings.
Series C Preferred Stock [Member] | Private Placement [Member]
Subsequent Event [Line Items]
Stock Issued During Period, Shares, New Issues					2,500
Conversion Price Per Share					$ 1.50
Preferred Stock, Par or Stated Value Per Share					$ 1,000
Stock Issued During Period, Value, New Issues					$ 2.5
Conversion of Stock, Shares Converted					1,666,668
Series C Preferred Stock [Member] | Maximum [Member]
Subsequent Event [Line Items]
Preferred Stock Redemption Price Percentage		180.00%
Series C Preferred Stock [Member] | Minimum [Member]
Subsequent Event [Line Items]
Preferred Stock Redemption Price Percentage		162.00%
Subsequent Event | Series E Warrant [Member]
Subsequent Event [Line Items]
Conversion Price Per Share		$ 2.005
Percentage of Investors Subscription Amount		85.00%
Warrant Expiration Term	5 years
Subsequent Event | Series E Preferred Stock [Member]
Subsequent Event [Line Items]
Conversion Price Per Share		$ 2.005
Preferred Stock, Par or Stated Value Per Share		$ 1,000
Stock Issued During Period, Value, New Issues		$ 3.0
Conversion of Stock, Shares Converted		1,496,262
Convertible Preferred Stock, Terms of Conversion	(a) the conversion price then in effect or (b) 65% of the volume weighted average price of the Company’s common stock for ten consecutive days prior to the applicable conversion date.
Preferred Stock, Redemption Terms	The Series E Preferred Stock contains provisions providing for an adjustment in the conversion price upon the occurrence of certain events, including stock splits, stock dividends, and fundamental transactions. However, in no event may the conversion price be lower than $0.25 per share. The Company may redeem some or all of the Series E Preferred Stock for cash as follows: (i) on or prior to September 25, 2016, in an amount equal to 126% of the aggregate stated value then outstanding, (ii) after September 25, 2016 and on or prior to January 25, 2017, in an amount equal to 144% of the aggregate stated value then outstanding and (iii) after January 25, 2017, in an amount equal to 150% of the aggregate stated value then outstanding.
Conversion of Stock, Description		common stock for the issuance of the number of shares of common stock issuable upon the conversion of the Series E Preferred Stock in excess of 19.99% of the outstanding common stock (the Shareholder Approval). Until the Company obtains the Shareholder Approval, the conversion of the Series E Preferred Stock is limited to 19.99% of the currently outstanding common stock. Additionally, until the Series E Preferred Stock is no longer outstanding, the Investors may participate in future offerings for up to 50% of the amount of such offerings.
Preferred Stock, Dividend Rate, Percentage		5.00%
Subsequent Event | Series E Preferred Stock [Member] | Private Placement [Member]
Subsequent Event [Line Items]
Stock Issued During Period, Shares, New Issues		3,000