Annual report pursuant to Section 13 and 15(d)

Income Taxes - Reconciliation of Income Tax Expense Between Statutory U S Income Tax Rate With Actual Income Tax Provision (Detail)

v3.7.0.1
Income Taxes - Reconciliation of Income Tax Expense Between Statutory U S Income Tax Rate With Actual Income Tax Provision (Detail) - USD ($)
$ in Thousands
12 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Mar. 31, 2015
Income Tax Disclosure [Abstract]      
Statutory federal income taxes $ (8,545) $ (9,736) $ (8,365)
State income taxes, net of federal benefit 15 0 17
Non-deductible expenses (350) 821 2,171
Rate change (88) (224) 0
Change in uncertain tax liability 158 (123) 324
Change in valuation allowance 8,896 10,106 6,600
Return-to-provision adjustments (230) (630) 0
Total income tax provision $ (144) $ 214 $ 747