Annual report pursuant to Section 13 and 15(d)

Significant Accounting Policies (Details)

v3.6.0.2
Significant Accounting Policies (Details)
 3 Months Ended 12 Months Ended
Jul. 31, 2016
USD ($)
Apr. 30, 2016
USD ($)
Dec. 31, 2016
USD ($)
Sep. 30, 2016
USD ($)
Jun. 30, 2016
USD ($)
Mar. 31, 2016
USD ($)
Sep. 30, 2013
USD ($)
Dec. 31, 2016
USD ($)
classofstock
segment
shares
Dec. 31, 2015
USD ($)
classofstock
shares
Dec. 31, 2014
USD ($)
shares
Dec. 31, 2013
USD ($)
Net Loss Per Share of Common Stock, Basic and Diluted                      
Anti-dilutive amount | shares               0 0 625,208  
Restricted Cash [Abstract]                      
Certificate of deposit supporting lease obligation                     $ 175,000
Annual reduction permitted in restricted cash             $ 58,000        
Number of periods reduction may be allowed               3 years      
Security deposit required, end of third year             $ 13,000        
Deposited as collateral with Silicone Valley Bank     $ 62,828         $ 62,828 $ 0    
Grant Revenue Recognition [Abstract]                      
Revenue recognized on grant     182,000 $ 321,000 $ 650,000 $ 0   $ 1,152,987 $ 0 $ 0  
Clinical Trial Expense Accruals                      
Number of material adjustments to prior period estimates of accrued expenses | classofstock               0 0    
Segment information                      
Number of Operating Segments | segment               1      
Equipment                      
Property, Plant and Equipment [Abstract]                      
Computer, software, equipment and furniture, useful life               5 years      
Computers and software                      
Property, Plant and Equipment [Abstract]                      
Computer, software, equipment and furniture, useful life               4 years      
Furniture and Fixtures                      
Property, Plant and Equipment [Abstract]                      
Computer, software, equipment and furniture, useful life               5 years      
National Institute On Drug Abuse (NIDA)                      
Grant Revenue Recognition [Abstract]                      
Revenue recognized on grant               $ 1,020,000      
Research and Development Arrangement Contract to Perform for Others Amount Of Award   $ 1,020,000                  
National Institute on Alcohol Abuse and Alcoholism (NIAAA)                      
Grant Revenue Recognition [Abstract]                      
Revenue recognized on grant               132,000      
Research and Development Arrangement Contract to Perform for Others Amount Of Award $ 1,000,000                    
Silicone Valley Bank                      
Restricted Cash [Abstract]                      
Deposited as collateral with Silicone Valley Bank     $ 50,000         $ 50,000