Annual report pursuant to Section 13 and 15(d)

Liquidity - Additional Information (Detail)

v3.19.1
Liquidity - Additional Information (Detail) - USD ($)
Mar. 31, 2019
Mar. 31, 2018
May 23, 2017
Mar. 31, 2017
Mar. 31, 2016
Liquidity [Line Items]          
Cash $ 11,059,000 $ 13,051,000   $ 6,480,000 $ 11,231,000
Short-term debt, net of debt issuance costs of $0 and $205, respectively $ 0 $ 1,445,000      
Line of Credit          
Liquidity [Line Items]          
Borrowing capacity     $ 5,000,000