Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation - 2000 Plan (Details)

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Stock-Based Compensation - 2000 Plan (Details) - shares
 1 Months Ended 3 Months Ended 9 Months Ended
Aug. 31, 2015
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2015
Mar. 31, 2015
Non-qualified stock options issued prior to Fiscal 2015          
Stockholders' equity          
Options granted (in shares)       142,500  
Stock options          
Stockholders' equity          
Options outstanding (in shares)   536,139   536,139 658,171
Options granted (in shares)   0 0 29,225  
Restricted stock units          
Stockholders' equity          
Granted (in shares)       234,046  
Restricted stock units outstanding (in shares)   274,297   274,297 93,383
2000 Plan          
Stockholders' equity          
Number of shares of common stock reserved for issuance   1,849,000   1,849,000  
Number of shares of common stock increased under amended and restated plan 450,000        
Number of shares available for future grant   215,018   215,018  
Vesting period       4 years  
Expiration Term       10 years  
2000 Plan | Stock options          
Stockholders' equity          
Portion vesting one year after the issuance date (as a percent)       25.00%  
Portion vesting on first day of each month after one year from the issuance date (as a percent)       2.083%  
Vesting period after one year of grant       48 months  
Non-qualified stock options | Non-qualified stock options issued prior to Fiscal 2015          
Stockholders' equity          
Options granted (in shares)       2,343  
Non-qualified stock options | Stock options          
Stockholders' equity          
Options granted (in shares)       155,000  
Granted (in shares)       12,500  
Non-qualified stock options | Stock options | Executive Vice President and Chief Executive Officer          
Stockholders' equity          
Options granted (in shares)       100,000  
Non-qualified stock options | Stock options | Executive Vice President of Sales and Marketing          
Stockholders' equity          
Options granted (in shares)       42,500  
Non-qualified stock options | Stock options | Vice President of Operations          
Stockholders' equity          
Options granted (in shares)       12,500  
Non-qualified stock options | Restricted stock units          
Stockholders' equity          
Options granted (in shares)       2,343  
Non-qualified stock options | Restricted stock units | Vice President of Operations          
Stockholders' equity          
Options granted (in shares)       2,343