| Dec 31,
2017 | Dec 31,
2018 | Dec 31,
2019 | Dec 31,
2020 | Dec 31,
2021 | Dec 31,
2022 | Dec 31,
2023 | Dec 31,
2024 |
|---|
| Net loss | -50,384,176 | -139,074,895 | -195 | -269 | -704 | -443 | -335 | -257 |
|---|
| Allowance for credit losses | - | - | - | 0 | 0 | 0 | 0 | 0 |
|---|
| Inventory write-down | - | - | - | 0 | 1 | 0 | 1 | 1 |
|---|
| Depreciation and amortization expenses | - | - | 4 | 5 | 6 | 8 | 9 | 12 |
|---|
| Tangible Asset Impairment Charges | - | - | - | - | - | - | 0 | - |
|---|
| Amortization of deferred income | - | -312,000 | -0 | -0 | -1 | -3 | -3 | -4 |
|---|
| Share-based compensation | 10 | 12 | 20 | 25 | 41 | 61 | 80 | 71 |
|---|
| Share of loss from equity method investment | -249,652 | -586,551 | - | -1 | -1 | -0 | - | - |
|---|
| Loss (gain) from fair value changes of equity investment with readily determinable fair value | - | - | - | - | - | - | 3 | -6 |
|---|
| Losses on disposal of property and equipment | -12,961 | -704 | -0 | 0 | -0 | -1 | -0 | -0 |
|---|
| Gain on disposal of land use right | - | - | - | - | - | - | 0 | - |
|---|
| Noncash lease expenses | - | - | 3 | 4 | 6 | 8 | 9 | 8 |
|---|
| Gain from sale of intellectual property | - | - | - | - | - | - | 10 | - |
|---|
| Foreign currency remeasurement impact | - | - | - | - | - | -56 | -15 | -15 |
|---|
| Amortization of debt issuance cost | - | - | - | - | - | - | - | 1 |
|---|
| Accounts receivable | - | 89,708 | 4 | 1 | 42 | -4 | 20 | 27 |
|---|
| Notes receivable | - | - | - | - | 7 | 2 | -2 | -2 |
|---|
| Inventories | - | 3,822 | 6 | 7 | 7 | 15 | 15 | -4 |
|---|
| Prepayments and other current assets | 810,979 | 5 | 1 | 4 | 7 | 19 | -12 | 19 |
|---|
| Long-term deposits | 38,845 | 249,913 | -0 | 0 | 0 | 1 | -0 | 0 |
|---|
| Value added tax recoverable | - | - | - | 8 | 2 | -23 | - | 1 |
|---|
| Accounts payable | 8 | 28 | -15 | 40 | 64 | -54 | 37 | -2 |
|---|
| Other current liabilities | - | - | 9 | -11 | 19 | 7 | 20 | -22 |
|---|
| Operating lease liabilities | - | - | -2 | -3 | -5 | -8 | -8 | -9 |
|---|
| Deferred income | 2 | - | - | 14 | 11 | -1 | 11 | 7 |
|---|
| Other non-current liabilities | - | - | - | - | - | - | 0 | - |
|---|
| Net cash used in operating activities | - | -97,538,022 | -191 | -216 | -549 | -368 | -198 | -215 |
|---|
| Purchases of short-term investments | - | 200 | 278 | 949 | 445 | 260 | 134 | 330 |
|---|
| Proceeds from maturity of short-term investments | - | - | - | - | - | 705 | 118 | 16 |
|---|
| Purchases of property and equipment | 9 | 10 | 6 | 10 | 18 | 25 | 7 | 6 |
|---|
| Proceeds from the sale of property and equipment | 82,789 | - | - | - | 0 | - | 0 | 0 |
|---|
| Acquisition of intangible assets | 14,690 | 102,834 | 1 | 1 | 1 | 0 | 1 | 56 |
|---|
| Proceeds from Sale of Intangible Assets | - | - | - | - | - | - | 10 | - |
|---|
| Proceeds from disposal of land use right | - | - | - | - | - | - | 4 | - |
|---|
| Net cash (used in) provided by investing activities | - | -212,553,897 | -15 | -555 | 250 | 420 | -11 | -375 |
|---|
| Proceeds from short-term debt | - | 4 | 7 | - | - | - | - | 132 |
|---|
| Repayment of short-term bank borrowings | - | - | 4 | 7 | - | - | - | 0 |
|---|
| Payment of debt issuance cost | - | - | - | - | - | - | - | 1 |
|---|
| Proceeds from Stock Options Exercised | 65,500 | 195,711 | 1 | 7 | 7 | 6 | 2 | 3 |
|---|
| Proceeds from Issuance of Common Stock | - | - | - | - | - | - | - | 217 |
|---|
| Payments of public offering costs | 3 | 691,527 | 1 | 5 | 2 | - | - | 1 |
|---|
| Taxes paid related to settlement of equity awards | - | - | - | - | - | - | 9 | - |
|---|
| Net cash provided by (used in) financing activities | - | 144 | 219 | 1,132 | 820 | -2 | -6 | 350 |
|---|
| Effect of foreign exchange rate changes on cash, cash equivalents and restricted cash | - | - | 0 | 5 | 1 | -6 | -3 | -0 |
|---|
| Net (decrease) increase in cash, cash equivalents and restricted cash | - | - | 13 | 366 | 522 | 44 | -218 | -240 |
|---|
| Cash paid for interest | - | 35,799 | 0 | 0 | - | - | - | 2 |
|---|
| Payables for purchase of property and equipment | 413,657 | 2 | 0 | 1 | 3 | 5 | 2 | 0 |
|---|
| Non Cash Payables For Intangible Assets | - | 225,158 | - | 0 | 0 | 0 | 12 | 3 |
|---|
| Payables for public offering costs | - | - | - | - | - | - | - | 1 |
|---|
| Right-of-use asset acquired under operating leases | - | - | - | - | - | 15 | 4 | 15 |
|---|
| Receivables for stock option exercise under equity incentive plans | - | - | - | - | - | - | - | 0 |
|---|