Annual report pursuant to Section 13 and 15(d)

Product Warranties (Details)

v3.8.0.1
Product Warranties (Details) - USD ($)
$ in Thousands
12 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Changes in Company's product warranty reserve    
Total product warranty reserve, beginning of period $ 395 $ 436
Product Warranty Expense 57 122
Utilization (152) (163)
Total product warranty reserve, end of period $ 300 $ 395