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Equity - Additional Information (Detail) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Sep. 30, 2020
Class Of Stock [Line Items]      
Common stock, shares issued 42,321,000   42,298,000
Total unrecognized compensation cost related to unvested stock options $ 100    
Weighted-average recognition period of unrecognized compensation cost related to unvested stock options 1 year 3 months 18 days    
Stock option awards, granted 0 0  
Stock option awards, forfeitures 250,000 0  
Total intrinsic value of options vested outstanding $ 100    
Stock-based compensation expense $ 48 $ 112  
Stock options, outstanding 1,500,000    
Number of vested warrants issued, price per share $ 3.54    
Warrants exercisable to purchase outstanding 2,900,000    
Weighted average exercise price, stock warrants $ 1.11    
Common Stock Awards [Member]      
Class Of Stock [Line Items]      
Stock-based compensation expense $ 31 28  
Maximum [Member] | Common Stock Awards [Member]      
Class Of Stock [Line Items]      
Stock-based compensation expense $ 100 $ 100  
Common Stock [Member]      
Class Of Stock [Line Items]      
Common stock, shares issued 23,256