Annual report pursuant to Section 13 and 15(d)

Income Taxes - Additional Information (Detail)

v3.8.0.1
Income Taxes - Additional Information (Detail) - USD ($)
$ in Thousands
12 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Mar. 31, 2016
Mar. 31, 2015
Income Taxes [Line Items]        
Tax Cuts and Jobs Act of 2017, change in tax rate, deferred tax asset $ 14,830      
Valuation allowance 30,394 $ 40,922 $ 32,026  
Change in valuation allowance (10,528)      
Increase against deferred tax assets generated 4,300      
Unrecognized tax benefits, affect annual effective tax rate 838 941 783 $ 905
Interest/penalties 26 $ (52) $ (1)  
U S Federal And State Tax        
Income Taxes [Line Items]        
Net operating loss (NOL) carry-forwards 92,500      
Australia federal tax        
Income Taxes [Line Items]        
Net operating loss (NOL) carry-forwards 5,000      
Israel federal tax        
Income Taxes [Line Items]        
Net operating loss (NOL) carry-forwards $ 4,300