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Subsequent Events - Additional Information (Detail)
 12 Months Ended
Mar. 16, 2017
$ / shares
Mar. 01, 2017
shares
Feb. 17, 2017
USD ($)
Jan. 06, 2017
USD ($)
Sep. 14, 2016
$ / shares
Dec. 31, 2016
USD ($)
shares
Dec. 31, 2015
USD ($)
shares
Sep. 30, 2016
shares
Subsequent Event [Line Items]                
Common stock, shares authorized | shares           140,000,000 110,000,000 700,000,000
Cash received from property, plant and equipment           $ 17,000 $ 82,000  
Gain (loss) on property, plant and equipment           $ (600,000)    
Subsequent Event                
Subsequent Event [Line Items]                
Stock split of common stock   0.2            
Common stock, shares authorized | shares   140,000,000            
Minimum closing bid price of common stock | $ / shares $ 1.00              
Subsequent Event | Land, Buildings and Improvements | California                
Subsequent Event [Line Items]                
Amount of divestiture of long-lived       $ 17,300,000        
Cash received from property, plant and equipment     $ 17,300,000          
Net cash received from property, plant and equipment       16,700,000        
Payments for commissions and other fees       624,000        
Gain (loss) on property, plant and equipment       $ (564,000)        
NASDAQ                
Subsequent Event [Line Items]                
Bid price of common stock, closing price | $ / shares         $ 1.00      
Bid price of common stock, period less than required closing bid price         30 years      
Bid price of common stock, period provided to regain compliance         180 years      
Bid price of common stock, date provided to regain compliance         Mar. 13, 2017