Annual report pursuant to Section 13 and 15(d)

Liquidity - Additional Information (Detail)

v3.7.0.1
Liquidity - Additional Information (Detail) - USD ($)
Sep. 28, 2016
Mar. 31, 2017
Mar. 31, 2016
Mar. 31, 2015
Mar. 31, 2014
Liquidity [Line Items]          
Cash   $ 6,149,000 $ 11,231,000 $ 7,069,000 $ 21,805,000
Repayments $ 11,000,000        
Convertible Notes Payable          
Liquidity [Line Items]          
Debt face amount $ 16,000,000 $ 16,000      
Interest rate 8.75%        
Proceeds $ 14,316,000        
Silicon Valley Bank          
Liquidity [Line Items]          
Repayments 3,000,000        
North Atlantic Capital          
Liquidity [Line Items]          
Repayments $ 8,000,000