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Equity-method investees - Schedule of Fair Values of Identifiable Assets and Liabilities of Subsidiary (Parenthetical) (Detail) - Natuzzi Trading (Shanghai) Co., Ltd [member]
5 Months Ended 12 Months Ended
Jul. 27, 2018
Dec. 31, 2018
Dec. 31, 2019
Dec. 31, 2018
Disclosure of joint ventures [line items]        
Retained ownership interest of joint venture   49.00% 49.00% 49.00%
Additional interest in subsidiary 23.54%      
At fair value [member]        
Disclosure of joint ventures [line items]        
Ownership interest of joint venture 49.00%      
Retained ownership interest of joint venture   49.00%