Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation - Grants outside of 2000 Plan (Details)

v3.5.0.2
Stock-Based Compensation - Grants outside of 2000 Plan (Details) - shares
3 Months Ended 6 Months Ended
Sep. 30, 2016
Sep. 30, 2016
Mar. 31, 2016
Stock options      
Class of Stock      
Options outstanding (in shares) 465,266 465,266 467,631
Granted (in shares)   88,930  
Stock options | Non-qualified stock options      
Class of Stock      
Options outstanding (in shares) 237,159 237,159  
Granted (in shares) 88,930    
Stock options | Non-qualified stock options | Executive Vice President and Chief Executive Officer      
Class of Stock      
Options outstanding (in shares) 100,000 100,000  
Stock options | Non-qualified stock options | Executive Vice President of Sales and Marketing      
Class of Stock      
Options outstanding (in shares) 42,500 42,500  
Stock options | Non-qualified stock options | Former Vice President of Operations      
Class of Stock      
Options outstanding (in shares) 5,729 5,729  
Stock options | Non-qualified stock options | Vice President, Manufacturing      
Class of Stock      
Options outstanding (in shares) 88,930 88,930  
Restricted stock units      
Class of Stock      
Restricted stock units outstanding (in shares) 14,820 14,820  
Granted (in shares) 14,820    
Restricted stock units | Vice President, Manufacturing      
Class of Stock      
Restricted stock units outstanding (in shares) 14,820 14,820  
Non-qualified stock options granted prior to fiscal 2017 | Non-qualified stock options      
Class of Stock      
Options outstanding (in shares) 148,229 148,229