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Investment in Unconsolidated Joint Venture - Narrative (Detail)
 1 Months Ended 3 Months Ended 6 Months Ended
May 31, 2020
USD ($)
Feb. 29, 2020
USD ($)
Nov. 01, 2020
USD ($)
ft²
Aug. 02, 2020
USD ($)
Nov. 03, 2019
USD ($)
Aug. 04, 2019
USD ($)
Nov. 01, 2020
USD ($)
ft²
Nov. 03, 2019
USD ($)
May 03, 2020
USD ($)
Dec. 20, 2019
USD ($)
ft²
Schedule of Equity Method Investments [Line Items]                    
Net income (loss)     $ 2,384,000 $ (2,733,000) $ 2,192,000 $ 1,174,000 $ (349,000) $ 3,366,000    
Income (loss) from investment in unconsolidated joint venture     100,000   (16,000)   167,000 (3,000)    
Investment in unconsolidated joint venture     $ 1,859,000   1,504,000   $ 1,859,000 1,504,000 $ 1,602,000 [1]  
CLIH [Member]                    
Schedule of Equity Method Investments [Line Items]                    
Equity method investment, ownership percentage     50.00%       50.00%      
Area of additional plant facility | ft²     80,000       80,000     40,000
Contractual obligation                   $ 1,200,000
Payments to acquire additional plant facility $ 180,000 $ 600,000 $ 420,000       $ 420,000      
Income (loss) from investment in unconsolidated joint venture             167,000 (3,000)    
Investment in unconsolidated joint venture     $ 1,900,000   $ 1,500,000   1,900,000 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)             $ 334,000 $ (6,000)    
[1] Derived from audited financial statements.