XML 48 R35.htm IDEA: XBRL DOCUMENT v3.5.0.2
Stockholders' Equity (Additional Information) (Detail) - USD ($)
 1 Months Ended 3 Months Ended 6 Months Ended 12 Months Ended
Jan. 12, 2016
Apr. 10, 2015
Mar. 18, 2015
Nov. 18, 2014
Apr. 10, 2015
Jun. 30, 2016
Jun. 30, 2016
Jun. 30, 2015
Dec. 31, 2014
Jul. 14, 2016
May 10, 2016
Dec. 31, 2015
May 08, 2013
Class of Stock [Line Items]                          
Preferred stock, shares authorized           5,000,000 5,000,000         5,000,000  
Preferred stock, par value (usd per share)           $ 0.0001 $ 0.0001         $ 0.0001  
Common stock, shares authorized     3,653,846     275,000,000 275,000,000     350,000,000   275,000,000  
Common stock, par value (usd per share)           $ 0.0001 $ 0.0001         $ 0.0001  
Common stock, additional shares authorized                   75,000,000      
Proceeds from Issuance or Sale of Equity     $ 38,000,000       $ 78,000 $ 110,000          
Purchase Agreement Term       36 months                  
Share Price     $ 1.56                    
Issuance of common stock, shares 19,772,727   24,358,974                    
Number of Shares Per Unit     0.50                    
Exercise price (usd per share) $ 1.42   $ 2.08               $ 1.51   $ 2.47
Number of shares availabe from warrants     1,826,923                    
Stock Issued During Period, Shares, Overallotment Option   3,653,846 1,826,923                    
Proceeds From Issuance or Sale of Equity, Net Underwriting Discounts, Commissions and Offering Expenses $ 20,200,000 $ 5,400,000     $ 40,800,000                
Stock purchase price per share (usd per share) $ 1.10                        
Stock Issued During Period, Value, New Issues $ 21,800,000                        
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right 0.60                        
Lincoln Park Capital, LLC [Member]                          
Class of Stock [Line Items]                          
Proceeds from Issuance or Sale of Equity       $ 4,900,000   $ 4,400,000              
Stock Issued During Period, Shares, Purchase of Assets       2,500,000                  
Share Price       $ 2.00                  
Issuance of common stock, shares           2,700,000              
Lincoln Park Capital, LLC [Member] | Common Stock [Member]                          
Class of Stock [Line Items]                          
Proceeds from Issuance or Sale of Equity       $ 50,000,000                  
Issuance of common stock, shares       631,221                  
MLV & Co. LLC and Maxim Group LLC [Member]                          
Class of Stock [Line Items]                          
Proceeds from Issuance or Sale of Equity           $ 2,300,000              
Issuance of common stock, shares           1,400,000              
At Market Issuance Sales Agreements, Percent of Gross Proceeds                       3.00%  
At Market Issuance Sales Agreements, Maximum Gross Proceeds                 $ 20,000,000        
Over-Allotment Option [Member]                          
Class of Stock [Line Items]                          
Stock Available for Issuance, Shares, New Issues 2,965,909                        
Number of shares availabe from warrants 1,779,545