Quarterly report pursuant to Section 13 or 15(d)

Product Warranties (Details)

v3.8.0.1
Product Warranties (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Changes in Company's standard product warranty reserve [Roll Forward]        
Total product warranty reserve at the beginning of the period $ 385 $ 439 $ 395 $ 436
Warranty expense to cost of revenue 105 33 118 67
Utilization (44) (12) (67) (43)
Total product warranty reserve at the end of the period $ 446 $ 460 $ 446 $ 460