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Fair Value Measurements (Tables)
 9 Months Ended
Oct. 31, 2015
Fair Value Disclosures [Abstract]  
Summary of Fair Value Assumptions for Derivative Liabilities
The fair value of the Series B Preferred shares was estimated using an option-pricing model that requires Level 3 inputs, which are highly subjective and determined using the following significant assumptions as of:
 
October 31, 2015
 
November 1, 2014
Stock price
$0.27
 
$1.52
Conversion price
$1.75
 
$1.75
Expected volatility
69%
 
76%
Expected term (in years)
6.1
 
7.1
Risk free interest rate
1.70%
 
2.05%
Expected dividends
$—
 
$—
Summary of Activity Recorded for Derivatives Using Level 3 Inputs
The following table presents the activity recorded for the derivative liability during the first three quarters ended:
 
October 31, 2015
 
November 1, 2014
 
(In thousands)
Beginning balance
$
28,448

 
$
30,720

Gain on change in fair value
(9,081
)
 
(1,225
)
Balance at end of first quarter
$
19,367


$
29,495

Gain on change in fair value
(15,717
)

(10,434
)
Balance at end of second quarter
$
3,650

 
$
19,061

Gain on change in fair value
(2,718
)
 
(4,881
)
Balance at end of third quarter
$
932

 
$
14,180