Prepaid and other assets (Details) $ in Thousands, ¥ in Millions |
May 18, 2023
USD ($)
|
May 18, 2023
CNY (¥)
|
Nov. 28, 2025
USD ($)
|
Nov. 28, 2025
CNY (¥)
|
Oct. 14, 2024
USD ($)
|
Oct. 14, 2024
CNY (¥)
|
Sep. 25, 2024
USD ($)
|
Sep. 25, 2024
CNY (¥)
|
Dec. 15, 2023
USD ($)
|
Dec. 15, 2023
CNY (¥)
|
May 05, 2023
USD ($)
|
May 05, 2023
CNY (¥)
|
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Prepaid and other assets (Details) [Line Items] | ||||||||||||
| Payments for deposits | $ 4,480 | ¥ 32.4 | ||||||||||
| First Deposit [Member] | ||||||||||||
| Prepaid and other assets (Details) [Line Items] | ||||||||||||
| Deposit | $ 3,530 | ¥ 25.0 | ||||||||||
| Second Deposit [Member] | ||||||||||||
| Prepaid and other assets (Details) [Line Items] | ||||||||||||
| Deposit | $ 2,120 | ¥ 15.0 | ||||||||||
| Third Deposit [Member] | ||||||||||||
| Prepaid and other assets (Details) [Line Items] | ||||||||||||
| Deposit | $ 1,390 | ¥ 10.0 | ||||||||||
| Fourth Deposit [Member] | ||||||||||||
| Prepaid and other assets (Details) [Line Items] | ||||||||||||
| Deposit | $ 4,450 | ¥ 32.0 | ||||||||||
| Fifth Deposit [Member] | ||||||||||||
| Prepaid and other assets (Details) [Line Items] | ||||||||||||
| Deposit | $ 4,550 | ¥ 32.0 |