Annual report pursuant to Section 13 and 15(d)

Schedule II - Valuation and Qualifying Accounts (Detail)

v3.7.0.1
Schedule II - Valuation and Qualifying Accounts (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Mar. 31, 2015
Reserve for Doubtful Accounts Receivable [Member]      
Valuation and Qualifying Accounts Disclosure [Line Items]      
Balance at Beginning of Period $ 91 $ 62 $ 46
Charged to Costs and Expenses 91 38 24
Deductions (14) (9) (8)
Balance at End of Period 168 91 62
Product Warranty Liability [Member]      
Valuation and Qualifying Accounts Disclosure [Line Items]      
Balance at Beginning of Period 686 653 308
Charged to Costs and Expenses 106 336 930
Deductions (254) (303) (585)
Balance at End of Period 538 686 653
Restructuring Reserve [Member]      
Valuation and Qualifying Accounts Disclosure [Line Items]      
Balance at Beginning of Period 74 1,718  
Charged to Costs and Expenses 630 (3) 1,718
Deductions (584) (1,641)  
Balance at End of Period $ 120 $ 74 $ 1,718