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Net Income (Loss) per Common Share (Tables)
 12 Months Ended
Mar. 31, 2017
Earnings Per Share [Abstract]  
Summary of the effect of net income per common share
The effect of net income (loss) per common share is calculated based upon the following shares: 
 
Fiscal Year Ended March 31,
 
2017
 
2016
 
2015
Numerator:
 
 
 
 
 
Net loss (dollars in thousands)
$
(12,288
)
 
$
(20,126
)
 
$
(32,061
)
Denominator:
 
 
 
 
 
Weighted-average common shares outstanding
28,156,382

 
27,627,693

 
22,353,419

Weighted-average common shares and share equivalents outstanding
28,156,382

 
27,627,693

 
22,353,419

Net loss per common share:
 
 
 
 
 
Basic
$
(0.44
)
 
$
(0.73
)
 
$
(1.43
)
Diluted
$
(0.44
)
 
$
(0.73
)
 
$
(1.43
)
Number of potentially dilutive securities
The following table indicates the number of potentially dilutive securities as of the end of each period: 
 
March 31,
 
2017
 
2016
 
2015
Common stock options
1,520,953

 
2,017,046

 
2,426,836

Restricted shares
1,704,543

 
1,053,389

 
704,688

Total
3,225,496

 
3,070,435

 
3,131,524