Annual report pursuant to Section 13 and 15(d)

Liquidity - Additional Information (Detail)

v3.20.1
Liquidity - Additional Information (Detail) - USD ($)
Feb. 28, 2020
Mar. 31, 2020
Mar. 31, 2019
Mar. 31, 2018
May 23, 2017
Mar. 31, 2017
Liquidity [Line Items]            
Cash   $ 21,659,000 $ 11,059,000 $ 13,051,000   $ 6,480,000
Short-term debt, net of debt issuance costs of $62 and $0, respectively   1,188,000 $ 0      
Line of Credit            
Liquidity [Line Items]            
Maximum borrowing capacity         $ 5,000,000  
New Credit Agreement            
Liquidity [Line Items]            
Amount outstanding   $ 20,000,000        
New Credit Agreement | Line of Credit            
Liquidity [Line Items]            
Debt face amount $ 5,000,000          
New Credit Agreement | Term Loan            
Liquidity [Line Items]            
Debt face amount 20,000,000          
New Credit Agreement | Minimum | Term Loan            
Liquidity [Line Items]            
Principal payment amount 250,000          
New Credit Agreement | Maximum | Term Loan            
Liquidity [Line Items]            
Principal payment amount $ 1,250,000