Quarterly report pursuant to Section 13 or 15(d)

Accrued Warranty Reserve (Details)

v3.8.0.1
Accrued Warranty Reserve (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Dec. 31, 2016
Sep. 30, 2017
Sep. 30, 2016
Maximum period of product warranties   18 months  
Provision for warranty expenses   $ 995 $ 775
Balance of warranty provision   3,766  
Accrued Warranty Reserve      
Balance, beginning of the period   3,766  
Standard warranty provision   1,190  
Accrual related to reliability repair programs   (195)  
Deductions for warranty claims   (2,199)  
Balance, end of the period   2,562  
C200      
Provision for warranty expenses $ 5,200    
Balance of warranty provision   700  
Accrued Warranty Reserve      
Balance, end of the period   $ 700