{"cik":1780652,"taxonomy":"us-gaap","tag":"AmortizationOfIntangibleAssets","label":"Amortization of Intangible Assets","description":"The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.","entityName":"Canaan Inc.","units":{"USD":[{"start":"2024-01-01","end":"2024-12-31","val":159000,"accn":"0001410578-25-000805","fy":2024,"fp":"FY","form":"20-F","filed":"2025-04-18"},{"start":"2024-01-01","end":"2024-12-31","val":159000,"accn":"0001104659-26-043786","fy":2025,"fp":"FY","form":"20-F","filed":"2026-04-15","frame":"CY2024"},{"start":"2025-01-01","end":"2025-12-31","val":212000,"accn":"0001104659-26-043786","fy":2025,"fp":"FY","form":"20-F","filed":"2026-04-15","frame":"CY2025"}]}}