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Amount for accounts payable to related parties.

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Carrying amount as of the balance sheet date of obligations due all related parties. For classified balance sheets, represents the current portion of such liabilities (due within one year or within the normal operating cycle if longer).

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The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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Direct costs arising from transactions with related parties who are not affiliates or joint Ventures. These costs are categorized as cost of goods sold.

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Expenses recognized resulting from transactions (excluding transactions that are eliminated in consolidated or combined financial statements) with related party.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Purchases during the period (excluding transactions that are eliminated in consolidated or combined financial statements) with related party.

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Amount of revenue, fees and commissions earned from transactions between (a) a parent company and its subsidiaries; (b) subsidiaries of a common parent; (c) an entity and trusts for the benefit of employees, for example, but not limited to, pension and profit-sharing trusts that are managed by or under the trusteeship of the entity's management; (d) an entity and its principal, owners, management, or members of their immediate families; and (e) affiliates.

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Related Party - Additional Information (Details) - USD ($)		1 Months Ended	12 Months Ended
	Nov. 07, 2022	Apr. 30, 2022	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Fulgent Pharma \| Ming Hsieh, the Chief Executive Officer and Chairman
Related Party Transaction [Line Items]
Percentage of ownership		100.00%
AHMC Healthcare Inc. \| Genetic Sequencing Services
Related Party Transaction [Line Items]
Revenue from related parties			$ 1,500,000	$ 3,400,000	$ 3,100,000
Trade accounts receivable, net from related parties			93,000	556,000
Fulgent Pharma LLC
Related Party Transaction [Line Items]
Due to related parties				679,000
Related party costs			0	0	0
Fulgent Pharma LLC \| Research Development Service
Related Party Transaction [Line Items]
Expenses to transport employees and supplies			0	330,000	427,000
PTJ Associates Inc
Related Party Transaction [Line Items]
Expenses to transport employees and supplies			235,000	142,000	343,000
Accounts payable to related parties			0	0
ANP Technologies Inc
Related Party Transaction [Line Items]
Due to related parties			607,000	0
Purchase of COVID-19 antigen rapid tests kits and licensing and development services from related party			$ 1,200,000	$ 0	$ 0
ANP Technologies, Inc., \| Ming Hsieh
Related Party Transaction [Line Items]
Ownership percentage			20.00%
Restricted Stock Units \| Fulgent Pharma \| Paul Kim
Related Party Transaction [Line Items]
RSU assumed	77,585
Restricted Stock Units \| Fulgent Pharma \| Jian Xie
Related Party Transaction [Line Items]
RSU assumed	129,309
Restricted Stock Units \| Fulgent Pharma \| Hanlin Gao
Related Party Transaction [Line Items]
RSU assumed	51,723
Restricted Stock Units \| Fulgent Pharma \| Other employees
Related Party Transaction [Line Items]
RSU assumed	117,398
Restricted Stock Units \| Fulgent Pharma \| Consultants
Related Party Transaction [Line Items]
RSU assumed	286,998