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Shareholders' Equity (Tables)
 12 Months Ended
Jan. 28, 2017
Equity [Abstract]  
Summary of Stock Warrant Activity
The following is a summary of stock warrants activity during the fiscal year ended January 28, 2017:
 
Number of
Warrants
 
Weighted
Average
Exercise Price
 
Weighted
Average
Remaining
Contractual
Life
 
Aggregate
Intrinsic
Value
(in thousands)
Outstanding as of January 30, 2016
6,299,971

 
$
11.80

 

 


Granted
—

 
—

 

 

Exercised
—

 
—

 

 


Forfeited
—

 
—

 

 


Outstanding as of January 28, 2017
6,299,971

 
$
11.80

 
1.4
 
$
—

Vested and expected to vest as of January 28, 2017
—

 
$
11.80

 
1.4
 
$
—

Exercisable as of January 28, 2017
—

 
$
11.80

 
1.4
 
$
—
Schedule of Stock Option Weighted Average Valuation Assumptions
The fair value for stock options issued during the fiscal years ended January 28, 2017 and January 30, 2016 was estimated at the date of grant, using the Black-Scholes option pricing model with the following weighted average assumptions: 
 
Fiscal Year Ended
January 28, 2017
 
Fiscal Year Ended
January 30, 2016
Expected life (years)
5
 
5
Expected stock price volatility
85.0% - 86.0%
 
86.0% - 88.9%
Risk-free interest rates
1.1% - 1.3%
 
1.6% - 1.7%
Expected dividend yield
0%
 
0%