Quarterly report pursuant to Section 13 or 15(d)

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

v3.19.2
Stock-based Compensation - Allocation of Stock-based Compensation Expense (Details) - USD ($)
$ in Thousands
3 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Long Term Incentive Plan [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Total $ 1,196 $ 812
Share-based Payment Arrangement, Option [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Total 0 0
Restricted Stock [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Total 1,529 3,248
Cost of sales | Long Term Incentive Plan [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Total 384 238
Cost of sales | Share-based Payment Arrangement, Option [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Total 0 0
Cost of sales | Restricted Stock [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Total 490 351
Selling, General and Administrative Expenses [Member] | Long Term Incentive Plan [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Total 730 521
Selling, General and Administrative Expenses [Member] | Share-based Payment Arrangement, Option [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Total 0 0
Selling, General and Administrative Expenses [Member] | Restricted Stock [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Total 1,005 2,881
Research and Development Expense [Member] | Long Term Incentive Plan [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Total 82 53
Research and Development Expense [Member] | Share-based Payment Arrangement, Option [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Total 0 0
Research and Development Expense [Member] | Restricted Stock [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Total $ 34 $ 16