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)

v3.8.0.1
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, 2018
Mar. 31, 2017
Mar. 31, 2016
Income Tax Disclosure [Abstract]      
Statutory federal income taxes $ (5,750) $ (8,545) $ (9,736)
State income taxes, net of federal benefit 0 15 0
Non-deductible expenses 1,355 (350) 821
Rate change 14,830 (88) (224)
Change in uncertain tax liability (103) 158 (123)
Change in valuation allowance (10,528) 8,896 10,106
Return-to-provision adjustments (755) (230) (630)
Total income tax provision $ (951) $ (144) $ 214