Annual report pursuant to Section 13 and 15(d)

Stockholders' Equity (Details 3)

v3.8.0.1
Stockholders' Equity (Details 3) - USD ($)
$ / shares in Units, $ in Thousands
Jul. 31, 2016
Apr. 30, 2016
Jan. 31, 2016
Dec. 31, 2017
Class of Warrant or Right [Line Items]        
Exercise price (in dollars per share)       $ 8.45
Warrant Exercise Price $6.00 [Member]        
Class of Warrant or Right [Line Items]        
Warrant shares issued 12,500 12,500 12,500  
Market price $ 9.31 $ 8.37 $ 4.63  
Exercise price (in dollars per share) $ 6.00 $ 6.00 $ 6.00  
Term (years) 2 years 2 years 3 months 1 year 3 months  
Risk-free interest rate 0.72% 0.77% 0.97%  
Volatility 80.00% 80.00% 80.00%  
Dividend rate 0.00% 0.00% 0.00%  
Per share FV of warrant $ 5.19 $ 4.58 $ 1.24  
FV of warrant $ 65 $ 57 $ 16