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v3.19.1

Organization and Reorganization (Detail Textuals) $ / shares in Units, ¥ in Thousands, $ in Thousands | 1 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Nov. 20, 2018 CNY (¥) shares | Nov. 20, 2018 USD ($) $ / shares shares | Sep. 28, 2018 USD ($) | Jul. 27, 2018 USD ($) shares | Dec. 31, 2018 CNY (¥) shares | Dec. 31, 2018 USD ($) shares | Dec. 31, 2017 CNY (¥) | Dec. 31, 2016 CNY (¥) | Dec. 31, 2016 CAD ($) | Dec. 31, 2018 USD ($)
Subsidiary, Sale of Stock [Line Items] |  |  |  |  |  |  |  |  |  |
Proceeds of initial public offering, net of issuance costs |  |  |  |  | ¥ 103,372 | $ 15,034 |  |  |  |
Threshold limit for value of asset under the agreement | ¥ |  |  |  |  | 100,000 |  |  |  |  |
Variable interest entity registered capital | ¥ |  |  |  |  | 10,000 |  | ¥ 10,000 |  |  |
Net loss |  |  |  |  | 78,700 |  | 90,700 |  | $ 86,600 |
Net cash used in operating activities |  |  |  |  | (53,338) | $ (7,756) | (59,662) | ¥ (54,092) |  |
Accumulated deficit |  |  |  |  | ¥ (468,026) |  | ¥ (389,326) |  |  | $ (68,072)
Beijing Z-Park Fund Investment Center (Limited Partner) ("Beijing Z-Park Fund") |  |  |  |  |  |  |  |  |  |
Subsidiary, Sale of Stock [Line Items] |  |  |  |  |  |  |  |  |  |
Proceeds of initial public offering, net of issuance costs | $ |  |  | $ 50,000 |  |  |  |  |  |  |
Class A ordinary shares |  |  |  |  |  |  |  |  |  |
Subsidiary, Sale of Stock [Line Items] |  |  |  |  |  |  |  |  |  |
Number of initial public offering | 2,600,000 | 2,600,000 |  |  |  |  |  |  |  |
Offering 2,600,000 American Depositary Shares ("ADSs") issued and sold | 10,400,000 | 10,400,000 |  |  |  |  |  |  |  |
Share price per ADS | $ / shares |  | $ 7.80 |  |  |  |  |  |  |  |
Proceeds of initial public offering, net of issuance costs | ¥ 103,400 | $ 15,000 |  |  |  |  |  |  |  |
Series D-2 preferred shares | Beijing Z-Park Fund Investment Center (Limited Partner) ("Beijing Z-Park Fund") |  |  |  |  |  |  |  |  |  |
Subsidiary, Sale of Stock [Line Items] |  |  |  |  |  |  |  |  |  |
Preferred shares financing amount | $ |  |  |  | $ 50,000 |  |  |  |  |  |
Preferred shares acquired in purchase agreement |  |  |  | 20,630,925 |  |  |  |  |  |
Series D-2 preferred shares | Beijing Shengjing Fengtai Innovation Investment Center (Limited Partner) ("Beijing Shengjing Fengtai Innovation") |  |  |  |  |  |  |  |  |  |
Subsidiary, Sale of Stock [Line Items] |  |  |  |  |  |  |  |  |  |
Preferred shares financing amount | $ |  |  |  | $ 2,300 |  |  |  |  |  |
Preferred shares acquired in purchase agreement |  |  |  | 949,023 |  |  |  |  |  |
Best Cars Limited ("Best Cars") | Class A ordinary shares |  |  |  |  |  |  |  |  |  |
Subsidiary, Sale of Stock [Line Items] |  |  |  |  |  |  |  |  |  |
Number of ordinary shares held |  |  |  |  | 38,723,321 | 38,723,321 |  |  |  |

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