Annual report pursuant to Section 13 and 15(d)

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

v3.7.0.1
Income Taxes - Reconciliation of the Provision for Income Taxes (Detail) - USD ($)
$ in Thousands
12 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Mar. 31, 2015
Income Tax Expense Benefit Continuing Operations Income Tax Reconciliation [Abstract]      
Provision for income taxes at federal rate $ 2,467 $ 3,055 $ 7,613
State taxes 129 (28) (103)
Charges not deductible for income tax purposes 39 64 79
Recognition of tax benefit generated by qualified production activities deduction (209) (245) (382)
Research and development tax credits (196) (232) (180)
Valuation allowance (26) 33 214
Difference in federal rate (194)    
Other 16 (48) (224)
Total provision for income taxes $ 2,026 $ 2,599 $ 7,017