Quarterly report pursuant to Section 13 or 15(d)

Stock-based Compensation - Allocation of Stock-based Compensation Expense (Details)

v3.10.0.1
Stock-based Compensation - Allocation of Stock-based Compensation Expense (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Long Term Incentive Plan [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Total $ 1,242 $ 620 $ 2,056 $ 1,191
Employee Stock Option [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Total 0 0 0 0
Restricted Stock [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Total 3,175 910 6,421 1,440
Cost of Sales [Member] | Long Term Incentive Plan [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Total 335 168 574 314
Cost of Sales [Member] | Employee Stock Option [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Total 0 0 0 0
Cost of Sales [Member] | Restricted Stock [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Total 351 174 701 338
Selling, General and Administrative Expenses [Member] | Long Term Incentive Plan [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Total 840 416 1,361 804
Selling, General and Administrative Expenses [Member] | Employee Stock Option [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Total 0 0 0 0
Selling, General and Administrative Expenses [Member] | Restricted Stock [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Total 2,807 726 5,688 1,083
Research and Development Expense [Member] | Long Term Incentive Plan [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Total 67 36 121 73
Research and Development Expense [Member] | Employee Stock Option [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Total 0 0 0 0
Research and Development Expense [Member] | Restricted Stock [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Total $ 17 $ 10 $ 32 $ 19