Annual report pursuant to Section 13 and 15(d)

Income Taxes - Reconciliation of the Provision for Income Taxes (Detail)

v3.4.0.3
Income Taxes - Reconciliation of the Provision for Income Taxes (Detail) - USD ($)
$ in Thousands
12 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Mar. 31, 2014
Income Tax Expense Benefit Continuing Operations Income Tax Reconciliation [Abstract]      
Provision for income taxes at federal rate $ 3,055 $ 7,613 $ 5,149
State taxes (28) (103) (139)
Charges not deductible for income tax purposes 64 79 59
Recognition of tax benefit generated by qualified production activities deduction (245) (382) (403)
Research and development tax credits (232) (180) (80)
Valuation allowance 33 214 174
Uncertain tax positions     (134)
Other (48) (224) (61)
Total provision for income taxes $ 2,599 $ 7,017 $ 4,565