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Shareholders' Equity (Deficit) (Common Stock) (Details) (USD $)
 0 Months Ended 1 Months Ended 12 Months Ended 0 Months Ended 1 Months Ended 12 Months Ended 1 Months Ended 12 Months Ended
Jul. 01, 2013
Feb. 04, 2013
Jul. 24, 2012
Jul. 17, 2012
Mar. 31, 2013
Mar. 31, 2012
Nov. 30, 2011
Feb. 01, 2014
person
Feb. 02, 2013
Jan. 28, 2012
Sep. 23, 2013
Sep. 27, 2012
Jul. 24, 2012
IPO [Member]
Jul. 24, 2012
Shares Sold By Stockholders [Member]
Jul. 24, 2012
Underwriters [Member]
May 30, 2013
Restricted Shares [Member]
person
Feb. 28, 2013
Restricted Shares [Member]
person
Jul. 19, 2012
Restricted Shares [Member]
person
Mar. 31, 2012
Professional Services [Member]
Nov. 30, 2011
Professional Services [Member]
May 31, 2011
Professional Services [Member]
Feb. 28, 2011
Professional Services [Member]
Feb. 01, 2014
Common stock [Member]
Jan. 28, 2012
Common stock [Member]
Mar. 31, 2012
Performance Based Vesting Schedule [Member]
Jan. 28, 2012
Performance Based Vesting Schedule [Member]
Class of Stock [Line Items]                                                    
Options cancelled (shares)           2,020,620   35,300 2,020,620                               1,010,310 1,010,310
Percentage of shares vested (percent)         33.00% 33.00%                                        
Percentage of remaining shares vested (percent)               33.00%                                    
Compensation expense           $ 17,400,000   $ 13,500                                    
Expenses on date of modification           5,300,000   200,000 5,400,000                                  
Stock options vesting period from the date of grant (years)           2 years                                        
Warrants granted to purchase common stock (shares)                                     11,245   3,114 13,840        
Warrants holders common stock purchase price per share (dollars per share)                                     $ 11.21   $ 6.30 $ 6.30        
Exercise of warrants to purchase common stock (in shares)                                       5,191            
Fair value warrant to purchase common stock                 43,000 31,000                 43,000   6,000 25,000        
Issuance of common stock, net of issuance costs (in shares)             159,248                               3,565 159,248    
Proceeds from issuance of common stock             1,100,000 100,000                                    
Warrants exercised (shares)                 23,012                                  
Warrant outstanding (shares)                 0                                  
Reverse stock split ratio       0.3460                                            
Common stock, shares authorized       120,000,000       120,000,000 120,000,000                                  
Preferred stock dividend, percentage       8.00%       8.00% 8.00% 8.00%                                
Number of directors (person)               2               3 1 2                
Number of shares issued (shares)               1,878               1,990 594 3,529                
Initial public offering shares (shares)     11,057,692                   4,807,692 6,250,000 1,442,308                      
Initial public offering shares price per share (dollars per share)     $ 17.00                                              
Net proceeds from issuance of initial public offering after deducting underwriting discounts and commissions and offering costs     73,200,000                                              
Underwriters discount and legal, accounting, and other expenses     8,500,000                                              
Repayment of Term Loan Facility     65,300,000         15,000,000 65,500,000 0                                
Interest expense     700,000                                              
Number of shares of common stock reserved for issuance (shares)                       500,000                            
Discount on common stock fair value for employee purchases (percent)                       10.00%                            
Secondary stock offering 6,900,000 13,012,250                 7,100,000                              
Secondary Offering Price Per Share $ 36.00 $ 35.65                 $ 46.65                              
Stock Offering Expenses $ 1,000,000 $ 1,000,000                                                
Number of shares vested               1,627