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Ordinary Shares - Additional Information (Details)
$ / shares in Units, ¥ in Thousands
 1 Months Ended 12 Months Ended
Sep. 25, 2018
shares
Aug. 23, 2018
USD ($)
$ / shares
shares
Jul. 31, 2015
shares
Dec. 31, 2021
CNY (¥)
shares
Dec. 31, 2020
CNY (¥)
shares
Dec. 31, 2020
USD ($)
$ / shares
shares
Dec. 31, 2019
shares
Dec. 31, 2018
shares
Dec. 31, 2021
$ / shares
shares
Mar. 31, 2020
USD ($)
Sep. 24, 2018
shares
Aug. 22, 2018
$ / shares
shares
Jun. 30, 2018
shares
Dec. 31, 2017
shares
Class Of Stock [Line Items]                            
Common stock, par value per share | $ / shares   $ 0.00001                   $ 0.0001    
Preferred shares, par value | $ / shares   $ 0.00001                   $ 0.0001    
Number of ordinary shares   10                        
Surrendered percentage of ordinary shares after share split   90.00%                        
Stock, conversion basis       IPO, 16,145,454 issued Class A Ordinary Shares held by certain key management founders, 33,818,182 issued Pre-IPO Class B Ordinary Shares held by Red Better, and 67,636,364 issued Pre-IPO Class B Ordinary Shares held by Mr. Chen’s wholly-owned entity Viomi Limited was automatically converted by way of re-designation and re-classification into Class B Ordinary Shares on a one-for-one basis, and the rest of the outstanding Class A Ordinary Shares, the rest of the outstanding Pre-IPO Class B Ordinary Shares, and all outstanding Series A Preferred Shares was automatically converted by way of re-designation and re-classification into Class A Ordinary Shares on a one-for-one basis.                    
Shares repurchases, consideration amount | ¥       ¥ 12,068 ¥ 54,600                  
IPO                            
Class Of Stock [Line Items]                            
Common stock, shares authorized   5,000,000,000                        
Ordinary shares, voting rights       Each Class A Ordinary Share is entitled to one vote, and each Class B Ordinary Share is entitled to ten (10) votes, voting together as one class                    
Ordinary shares, Value of shares authorized | $   $ 50,000,000                        
Stock, conversion basis       Each Class B Ordinary Share is convertible into one Class A Ordinary Share at any time by the holder thereof.                    
Shares issued 34,200,000                          
Class A Ordinary Shares                            
Class Of Stock [Line Items]                            
Common stock, shares authorized           4,800,000,000     4,800,000,000     346,545,454    
Common stock, par value per share | $ / shares           $ 0.00001     $ 0.00001     $ 0.0001    
Ordinary shares, outstanding           104,163,686 98,444,732 90,200,000 105,516,779         25,363,636
Ordinary shares, voting rights       Each ordinary share is entitled to one vote                    
Common stock, shares issued   4,000,000       104,163,686     105,516,779       33,818,182  
Ordinary shares, transferred                         16,145,454  
Ordinary shares, surrendered                         17,672,728  
Fair value per share | $ / shares   $ 3.30                        
Shares issued               34,200,000            
Shares issued upon conversion (in shares)       339,999 7,295,454 7,295,454 6,750,000 18,181,818            
Issuance of ordinary shares for exercised share options (in shares)       3,011,064 2,655,669 2,655,669 1,494,732              
Shares repurchased during period       1,997,970 4,232,169 4,232,169                
Class A Ordinary Shares | Key Management Founders                            
Class Of Stock [Line Items]                            
Common stock, shares issued                     16,145,454      
Class A Ordinary Shares | IPO                            
Class Of Stock [Line Items]                            
Common stock, shares authorized   4,800,000,000                        
Common stock, par value per share | $ / shares   $ 0.00001                        
Class B Ordinary Shares                            
Class Of Stock [Line Items]                            
Common stock, shares authorized           150,000,000     150,000,000          
Common stock, par value per share | $ / shares           $ 0.00001     $ 0.00001          
Ordinary shares, outstanding           103,554,546 110,850,000 117,600,000 103,214,547          
Common stock, shares issued           103,554,546     103,214,547          
Class B Ordinary Shares | Red Better Limited                            
Class Of Stock [Line Items]                            
Common stock, shares issued                     33,818,182      
Class B Ordinary Shares | Viomi Limited                            
Class Of Stock [Line Items]                            
Common stock, shares issued                     67,636,364      
Shares issued     67,636,364                      
Class B Ordinary Shares | IPO                            
Class Of Stock [Line Items]                            
Common stock, shares authorized   150,000,000                        
Common stock, par value per share | $ / shares   $ 0.00001                        
Designated Common Stock | IPO                            
Class Of Stock [Line Items]                            
Common stock, shares authorized   50,000,000                        
Common stock, par value per share | $ / shares   $ 0.00001                        
American Depositary Shares                            
Class Of Stock [Line Items]                            
Share repurchase program, authorized amount | $                   $ 10,000,000        
Shares repurchased during period         1,410,723 1,410,723                
Shares repurchases, consideration amount | $           $ 8,030,000                
Shares repurchases, weighted average price per share | $ / shares           $ 5.69                
American Depositary Shares | IPO                            
Class Of Stock [Line Items]                            
Shares issued 11,400,000