Annual report pursuant to Section 13 and 15(d)

Income Taxes - Components of (Loss) Income Before Provision (Benefit) for Income Taxes (Detail)

v3.19.1
Income Taxes - Components of (Loss) Income Before Provision (Benefit) for Income Taxes (Detail) - USD ($)
$ in Thousands
12 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Mar. 31, 2017
Income Taxes [Line Items]      
(Loss) income before (benefit) provision for income taxes $ (145) $ (12,854) $ 7,049
U.S. [Member]      
Income Taxes [Line Items]      
(Loss) income before (benefit) provision for income taxes (256) (12,861) 7,346
China [Member]      
Income Taxes [Line Items]      
(Loss) income before (benefit) provision for income taxes $ 111 $ 7 $ (297)