XML 48 R36.htm IDEA: XBRL DOCUMENT v3.7.0.1
Summary of Significant Accounting Policies - Additional Information (Details)
 1 Months Ended 12 Months Ended
Jul. 21, 2016
Jul. 19, 2016
Jun. 13, 2016
USD ($)
Jun. 06, 2016
USD ($)
Dec. 31, 2016
USD ($)
Dec. 31, 2016
USD ($)
Segment
Jun. 30, 2016
USD ($)
Summary Of Significant Accounting Policies [Line Items]              
Maximum period of investments with original maturities from date of acquisition to be cash equivalents           3 months  
Reverse stock split ratio 0.0625            
Number of business segments | Segment           1  
Minimum [Member]              
Summary Of Significant Accounting Policies [Line Items]              
Estimated useful lives           3 years  
Reverse stock split ratio   0.1          
Maximum [Member]              
Summary Of Significant Accounting Policies [Line Items]              
Estimated useful lives           7 years  
Reverse stock split ratio   0.05          
Senior Secured Convertible Notes [Member]              
Summary Of Significant Accounting Policies [Line Items]              
Debt instrument, principal face amount     $ 35,000,000   $ 34,351,000 $ 34,351,000  
Senior Secured Convertible Notes [Member] | Series C Warrants [Member]              
Summary Of Significant Accounting Policies [Line Items]              
Debt instrument, principal face amount             $ 35,000,000
Senior Secured Convertible Notes [Member] | Securities Purchase Agreement [Member]              
Summary Of Significant Accounting Policies [Line Items]              
Debt instrument, principal face amount     35,000,000 $ 35,000,000      
Proceeds from issuance of notes available for general corporate purposes     3,000,000 3,000,000 3,000,000    
Cash proceeds from notes held     29,200,000   26,200,000 26,200,000  
Senior Secured Convertible Notes [Member] | Securities Purchase Agreement [Member] | First Release Date on December 29, 2016 [Member]              
Summary Of Significant Accounting Policies [Line Items]              
Cash proceeds from notes held     3,000,000        
Senior Secured Convertible Notes [Member] | Securities Purchase Agreement [Member] | Subsequent Release Dates Beginning in February 2017 [Member]              
Summary Of Significant Accounting Policies [Line Items]              
Cash proceeds from notes held     26,200,000   $ 26,200,000 $ 26,200,000  
Senior Secured Convertible Notes [Member] | Securities Purchase Agreement [Member] | Series C Warrants [Member]              
Summary Of Significant Accounting Policies [Line Items]              
Proceeds from issuance of notes     $ 32,200,000 $ 32,200,000