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Debt - Key terms of issuance of convertible notes (Details) | 12 Months Ended
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Dec. 31, 2023 USD ($) EquityInstruments item $ / shares shares | Dec. 31, 2022 USD ($) item EquityInstruments | Dec. 31, 2021 USD ($) item EquityInstruments | Dec. 31, 2020 EquityInstruments item | Dec. 31, 2019 item EquityInstruments | Dec. 31, 2017 EquityInstruments item $ / shares shares
Borrowings |  |  |  |  |  |
Conversion price | $ / shares | $ 3.50 |  |  |  |  |
Conversion price adjustment occurrence period | 3 months |  |  |  |  |
Conversion price adjustment period | 1 year |  |  |  |  |
Conversion price adjustment as percent of threshold price | 70.00% |  |  |  |  |
Gain on fair value adjustment of convertible note financial liabilities | $ | $ 2,619,000,000 | $ 2,673,000,000 |  |  |  |
Loss on fair value adjustment of convertible note financial liabilities | $ | $ 4,047,000,000 | $ 3,123,000,000 |  |  |  |
Minimum |  |  |  |  |  |
Borrowings |  |  |  |  |  |
Conversion price | $ / shares | $ 3.50 |  |  |  |  |
Conversion price adjustment as percent of threshold price | 70.00% |  |  |  |  |
Maximum |  |  |  |  |  |
Borrowings |  |  |  |  |  |
Threshold conversion price | $ / shares | $ 3.50 |  |  |  |  |
i Best Investment Co., Ltd. | Kyeongho Lee |  |  |  |  |  |
Borrowings |  |  |  |  |  |
Collateral, number of shares | shares | 40,000 |  |  |  |  |
M-Venture Investment, Inc. | Kyeongho Lee |  |  |  |  |  |
Borrowings |  |  |  |  |  |
Collateral, number of shares | shares | 170,000 |  |  |  |  |
1st convertible note | SG Ace Inc |  |  |  |  |  |
Borrowings |  |  |  |  |  |
Early repayment exercise, number of times | item |  |  |  |  |  | 4
Early repayment exercise period |  |  |  |  |  | 7 days
Early repayment commencement after issue of convertible notes |  |  |  |  |  | 2 years
Early repayment exercisable period |  |  |  |  |  | 3 years
Debt maturity term |  |  |  |  |  | 3 years
Annual interest rate |  |  |  |  |  | 4.00%
Conversion price | $ / shares |  |  |  |  |  | $ 3.50
Debt instrument conversion price prior to issuance of equity instruments | $ / shares |  |  |  |  |  | $ 3.50
Debt conversion, period prior to issuance of equity instruments |  |  |  |  |  | 7 days
Number of convertible shares | EquityInstruments |  |  |  |  |  | 5,142,858
1st convertible note | SG Ace Inc | Kyeongho Lee | Related party |  |  |  |  |  |
Borrowings |  |  |  |  |  |
Collateral, number of shares | shares |  |  |  |  |  | 885,867
2nd convertible note | M-Venture Investment, Inc. and one (1) institution |  |  |  |  |  |
Borrowings |  |  |  |  |  |
Early repayment exercise, number of times | item |  |  |  |  |  | 4
Early repayment exercise period |  |  |  |  |  | 7 days
Early repayment commencement after issue of convertible notes |  |  |  |  |  | 2 years
Early repayment exercisable period |  |  |  |  |  | 3 years
Debt maturity term |  |  |  |  |  | 3 years
Annual interest rate |  |  |  |  |  | 4.00%
Debt instrument conversion price prior to issuance of equity instruments | $ / shares |  |  |  |  |  | $ 3.50
Debt conversion, period prior to issuance of equity instruments |  |  |  |  |  | 7 days
Number of convertible shares | EquityInstruments |  |  |  |  |  | 5,142,858
2nd convertible note | M-Venture Investment, Inc. and one (1) institution | Kyeongho Lee | Related party |  |  |  |  |  |
Borrowings |  |  |  |  |  |
Collateral, number of shares | shares |  |  |  |  |  | 885,867
7th convertible note | NA Korea Trans Fund No.4, one (1) institution and eight(8) individual investors |  |  |  |  |  |
Borrowings |  |  |  |  |  |
Early repayment exercise, number of times | item |  |  |  |  | 4 |
Early repayment exercise period |  |  |  |  | 7 days |
Early repayment commencement after issue of convertible notes |  |  |  |  | 1 year |
Early repayment exercisable period |  |  |  |  | 2 years |
Debt maturity term |  |  |  |  | 3 years |
Annual interest rate |  |  |  |  | 4.00% |
Number of convertible shares | EquityInstruments |  |  |  |  | 553,790 |
16th convertible note | NA Korea Trans Fund No.4 and two (2) individual investors |  |  |  |  |  |
Borrowings |  |  |  |  |  |
Early repayment exercise, number of times | item |  |  |  | 4 |  |
Early repayment exercise period |  |  |  | 7 days |  |
Early repayment commencement after issue of convertible notes |  |  |  | 2 years |  |
Early repayment exercisable period |  |  |  | 3 years |  |
Debt maturity term |  |  |  | 3 years |  |
Annual interest rate |  |  |  | 4.00% |  |
Number of convertible shares | EquityInstruments |  |  |  | 102,597 |  |
22nd convertible note | i Best Investment Co., Ltd. |  |  |  |  |  |
Borrowings |  |  |  |  |  |
Early repayment exercise, number of times | item |  |  | 4 |  |  |
Early repayment exercise period |  |  | 7 days |  |  |
Early repayment commencement after issue of convertible notes |  |  | 2 years |  |  |
Early repayment exercisable period |  |  | 3 years |  |  |
Debt maturity term |  |  | 3 years |  |  |
Annual interest rate |  |  | 4.00% |  |  |
Number of convertible shares | EquityInstruments |  |  | 874,286 |  |  |
22nd convertible note | i Best Investment Co., Ltd. | Kyeongho Lee | Related party |  |  |  |  |  |
Borrowings |  |  |  |  |  |
Collateral, number of shares | shares | 175,000 |  |  |  |  |
23rd convertible note | Jeju Semiconductor Corp. |  |  |  |  |  |
Borrowings |  |  |  |  |  |
Early repayment exercise, number of times | item |  |  | 4 |  |  |
Early repayment exercise period |  |  | 7 days |  |  |
Early repayment commencement after issue of convertible notes |  |  | 2 years |  |  |
Early repayment exercisable period |  |  | 3 years |  |  |
Debt maturity term |  |  | 3 years |  |  |
Annual interest rate |  |  | 4.00% |  |  |
Number of convertible shares | EquityInstruments |  |  | 245,714 |  |  |
24th convertible note | Individual investor |  |  |  |  |  |
Borrowings |  |  |  |  |  |
Early repayment exercise, number of times | item |  |  | 4 |  |  |
Early repayment exercise period |  |  | 7 days |  |  |
Early repayment commencement after issue of convertible notes |  |  | 2 years |  |  |
Early repayment exercisable period |  |  | 3 years |  |  |
Debt maturity term |  |  | 3 years |  |  |
Annual interest rate |  |  | 7.00% |  |  |
Number of convertible shares | EquityInstruments |  |  | 180,000 |  |  |
25th convertible note | M-Venture Investment, Inc. |  |  |  |  |  |
Borrowings |  |  |  |  |  |
Early repayment exercise, number of times | item |  | 4 |  |  |  |
Early repayment exercise period |  | 7 years |  |  |  |
Early repayment commencement after issue of convertible notes |  | 1 year |  |  |  |
Early repayment exercisable period |  | 2 years |  |  |  |
Debt maturity term |  | 3 years |  |  |  |
Annual interest rate |  | 5.00% |  |  |  |
Number of convertible shares | EquityInstruments |  | 1,000,000 |  |  |  |
26th convertible note | Access Bio, Inc |  |  |  |  |  |
Borrowings |  |  |  |  |  |
Early repayment exercise, number of times | item |  | 8 |  |  |  |
Early repayment exercise period |  | 7 days |  |  |  |
Early repayment commencement after issue of convertible notes |  | 1 year |  |  |  |
Early repayment exercisable period |  | 3 years |  |  |  |
Debt maturity term |  | 3 years |  |  |  |
Annual interest rate |  | 4.00% |  |  |  |
Number of convertible shares | EquityInstruments |  | 1,428,571 |  |  |  |
27th convertible note | Blacktree Co., Ltd |  |  |  |  |  |
Borrowings |  |  |  |  |  |
Early repayment exercise, number of times | item | 4 |  |  |  |  |
Early repayment exercise period | 7 days |  |  |  |  |
Early repayment commencement after issue of convertible notes | 2 years |  |  |  |  |
Early repayment exercisable period | 3 years |  |  |  |  |
Debt maturity term | 3 years |  |  |  |  |
Annual interest rate | 5.00% |  |  |  |  |
Conversion price | $ / shares | $ 6.67 |  |  |  |  |
Debt instrument conversion price prior to issuance of equity instruments | $ / shares | $ 3.50 |  |  |  |  |
Debt conversion, period prior to issuance of equity instruments | 7 days |  |  |  |  |
Number of convertible shares | EquityInstruments | 299,850 |  |  |  |  |
5th convertible note | Amber International Ltd |  |  |  |  |  |
Borrowings |  |  |  |  |  |
Principal amount | $ |  |  | $ 708,000 |  |  |

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