XML 41 R16.htm IDEA: XBRL DOCUMENT v3.2.0.727
Derivative Liability (Tables)
 3 Months Ended
Jun. 30, 2015
Derivative Instruments And Hedging Activities Disclosure [Abstract]  
Assumptions Used to Value Derivative Liabilities at End of Each Reporting Period

The derivative liabilities were valued at the end of each reporting period using a Monte Carlo valuation model with the following assumptions:

 

 

 

June 30, 2015

 

 

March 31, 2015

 

 

June 30, 2014

 

Closing price per share of common stock

 

$

3.77

 

 

$

3.54

 

 

$

8.35

 

Exercise price per share

 

$

1.00

 

 

$

1.00

 

 

$

1.00

 

Expected volatility

 

 

73.90

%

 

 

76.80

%

 

 

78.20

%

Risk-free interest rate

 

 

0.64

%

 

 

0.56

%

 

 

1.62

%

Dividend yield

 

 

—

 

 

 

—

 

 

 

—

 

Remaining expected term of underlying securities

   (years)

 

 

1.71

 

 

 

1.96

 

 

 

2.71