Quarterly report pursuant to Section 13 or 15(d)

Product Warranties (Details)

v3.10.0.1
Product Warranties (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Changes in Company's standard product warranty reserve [Roll Forward]        
Total product warranty reserve at the beginning of the period $ 290 $ 385 $ 300 $ 395
Warranty expense to cost of revenue 12 105 32 118
Utilization (17) (44) (47) (67)
Total product warranty reserve at the end of the period $ 285 $ 446 $ 285 $ 446