Annual report pursuant to Section 13 and 15(d)

Sale of Common Stock and Warrants (Details)

v3.2.0.727
Sale of Common Stock and Warrants (Details) - USD ($)
$ / shares in Units, $ in Thousands
 12 Months Ended
Mar. 03, 2015
Feb. 25, 2015
Jun. 25, 2014
Mar. 31, 2015
Mar. 31, 2014
Mar. 31, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Stock issued (in shares) 2,716,535 4,416,000 913,500 7,132,535    
Public offering price (in dollars per share) $ 1.27 $ 1.25 $ 2.00      
Gross proceeds before deducting underwriting discount and other estimated offering expenses $ 3,450 $ 5,520 $ 1,827      
Underwriting Discount and Financing Expenses     $ 478 $ 1,035    
Number of common stock authorized under 2014 ATM plan (in shares)       50,000,000 50,000,000  
Aegis Capital Corporation [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Stock issued (in shares)     27,405 186,066    
Public offering price (in dollars per share)     $ 2.50 $ 1.25    
Warrants expiration date     Jun. 24, 2020 Feb. 25, 2020    
At Market Distribution Plan 2014 [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Stock issued (in shares)         1,810  
Number of common stock authorized under 2014 ATM plan (in shares)         709,046  
Minimum option exercise price specified as percentage of fair market value of common stock (in hundredths)         100.00%  
Maximum exercise period for vested nonqualified stock option         12 months  
Number of shares available for grant under 2014 ATM plan (in shares)         707,236  
Warrant [Member]            
Class of Warrant or Right [Line Items]            
Warrants issued (in shares)           185,777
Warrants fair value           $ 1,645
Interest rate on warrant issued (in hundredths)           1.62%
Term of warrants           4 years
Warrant expense           $ 0
Warrants outstanding (in shares)       4,469,471 0 92,888
Ownership interest (in hundredths)           25.00%
Weighted average exercise price of warrants (in dollars per share)   $ 1.18   $ 1.20 $ 30  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Exercise price of warrants (in dollars per share)   $ 1.18   $ 1.20 $ 30