Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements - Inputs (Details)

v3.8.0.1
Fair Value Measurements - Inputs (Details) - $ / shares
6 Months Ended
Sep. 30, 2017
Jun. 30, 2017
Mar. 31, 2017
Sep. 30, 2016
Sep. 28, 2016
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]          
Expected volatility 73.00%        
Stock price (in dollars per share) $ 1.51 $ 1.03 $ 0.94 $ 1.05 $ 0.99
CCE interest rate 1.00%        
Convertible note embedded derivative liability          
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]          
Expected volatility 70.00%        
Probability of change in control 1.75%        
Stock price (in dollars per share) $ 1.51        
Expected term 3 years        
Risk-free interest rate 1.61%        
Assumed early conversion/exercise price (in dollars per share) $ 2.73        
Warrant liability          
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]          
Expected volatility 70.00%        
Probability of change in control 1.75%        
Stock price (in dollars per share) $ 1.51        
Expected term 3 years        
Risk-free interest rate 1.61%        
Assumed early conversion/exercise price (in dollars per share) $ 2.73