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Ordinary Shares - Additional Information (Details) $ / shares in Units, ¥ in Thousands |  |  | 1 Months Ended | 12 Months Ended |  |  |  |  |  |
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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 |  |  |  |  |  |  |  |  |  |  |  |  |

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