Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Mar. 31, 2026	Dec. 31, 2025
Current assets:
Cash and cash equivalents	$ 1,594,103	$ 788,445
Marketable debt securities	614,506	439,526
Prepaid and other current assets	17,049	25,798
Total current assets	2,225,658	1,253,769
Marketable debt securities, net of current portion	328,289	184,568
Property, plant and equipment, net	95,615	42,312
Operating lease right-of-use assets	2,528	1,384
Indefinite-lived intangible assets	27,500	27,500
Goodwill	6,621	6,621
Other assets	17,298	12,303
Total assets	2,703,509	1,528,457
Current liabilities:
Accounts payable	14,209	4,145
Accrued expenses and other	21,896	20,497
Operating lease liabilities	1,031	904
Total current liabilities	37,136	25,546
Operating lease liabilities, net of current portion	1,589	546
Right of first refusal liability	25,000	25,000
Deferred tax liabilities	1,155	1,155
Total liabilities	64,880	52,247
Commitments and contingencies
Stockholders' equity:
Class A common stock, $0.0001 par value – 500,000,000 shares authorized; 173,867,839 and 160,514,103 shares issued and outstanding as of March 31, 2026 and December 31, 2025, respectively	17	16
Additional paid-in capital	2,913,931	1,715,787
Accumulated deficit	(273,837)	(240,772)
Accumulated other comprehensive (loss) income	(1,482)	1,179
Total stockholders’ equity	2,638,629	1,476,210
Total liabilities and stockholders’ equity	$ 2,703,509	$ 1,528,457

Right Of First Refusal Liability

No definition available.

Name:	oklo_RightOfFirstRefusalLiability
Namespace Prefix:	oklo_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).