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Investment in Unconsolidated Joint Venture - Narrative (Detail)
 1 Months Ended 3 Months Ended
May 31, 2020
USD ($)
Feb. 29, 2020
USD ($)
Aug. 02, 2020
USD ($)
ft²
Aug. 04, 2019
USD ($)
May 03, 2020
USD ($)
Dec. 20, 2019
USD ($)
ft²
Schedule of Equity Method Investments [Line Items]            
Net income (loss)     $ (2,733,000) $ 1,174,000    
Income (loss) from investment in unconsolidated joint venture     67,000 13,000    
Investment in unconsolidated joint venture     $ 1,759,000 1,520,000 $ 1,602,000 [1]  
CLIH [Member]            
Schedule of Equity Method Investments [Line Items]            
Equity method investment, ownership percentage     50.00%      
Area of facility | ft²     80,000      
Area of additional plant facility | ft²           40,000
Contractual obligation           $ 1,200,000
Payments to acquire additional plant facility $ 180,000 $ 600,000        
Payments to acquire additional plant facility, remaining     $ 420,000      
Income (loss) from investment in unconsolidated joint venture     67,000 13,000    
Investment in unconsolidated joint venture     1,800,000 1,500,000 $ 1,600,000  
CLIH [Member] | Equity Method Investment Nonconsolidated Investee Or Group of Investees [Member]            
Schedule of Equity Method Investments [Line Items]            
Net income (loss)     $ 134,000 $ 26,000    
[1] Derived from audited financial statements.