Common Stock Capital Shares Reserved for Future Percent

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- Definition

Shares Exchanged for Share

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- Definition

Weighted average period over grant

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- Definition

Carrying value as of the balance sheet date of obligations incurred through that date and payable for professional fees, such as for legal and accounting services received.

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- Definition

Aggregate number of common shares reserved for future issuance.

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- Definition

Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury.

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- Definition

Amount of contribution received by defined benefit plan from employer which increases plan assets.

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Amount of cost to be recognized for option under share-based payment arrangement.

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Amount of noncash expense for share-based payment arrangement.

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Discount rate from fair value on purchase date that participants pay for shares.

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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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The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

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Number of options outstanding, including both vested and non-vested options.

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Number of shares issued during the period as a result of an employee stock purchase plan.

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+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section S45
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480100/505-10-S45-3

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section S45
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480100/505-10-S45-2

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(29))
-Publisher FASB
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Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S50
-Paragraph 11
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480657/210-10-S50-11

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Stock Incentive and Employee Benefit Plan (Additional Information) (Details) - USD ($)						3 Months Ended		6 Months Ended
	Nov. 17, 2025	Jul. 22, 2025	Jul. 01, 2024	Feb. 13, 2023	Oct. 17, 2022	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025	Dec. 31, 2025	Jun. 11, 2024	Jan. 17, 2023
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Number of option outstanding to purchase common stock						1,475,000		1,475,000		1,504,000
Stock-based compensation								$ 7,224,000	$ 6,593,000
Unrecognized compensation cost related to unvested stock option grants						$ 12,300,000		12,300,000
Employee benefit plan contributions by employer						100,000	$ 100,000	200,000	300,000
Stock issued for services, shares			285,714	114,286
Accrued legal fees						$ 0		$ 0
Common stock, shares issued						8,493,000		8,493,000		8,491,267	3,250,000
2022 Equity Incentive Plan
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Common stock shares reserved for future issuance						2,792,377		2,792,377
2022 Equity Incentive Plan \| Common Stock [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Number of option outstanding to purchase common stock						1,032,071		1,032,071
2023 Inducement Plan
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Number of option outstanding to purchase common stock						1,474,612		1,474,612
Number of shares available for grant												40,000
Stock-based compensation						$ 3,600,000	3,300,000	$ 7,200,000	6,600,000
Weighted average period over grant								2 years 9 months 7 days
2022 Employee Stock Purchase Plan
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Common stock shares reserved for future issuance						170,575		170,575
Stock-based compensation						$ 8,300	$ 26,600	$ 20,500	$ 76,800
Shares issued under ESPP, shares								1,733
Purchase price of the common stock percentage					85.00%
2022 Employee Stock Purchase Plan \| Maximum
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Number of shares available for grant						215,569		215,569
Semnur 2024 Stock Option Plan
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Common stock shares reserved for future issuance						40,000,000		40,000,000
Semnur 2025 Plan
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Number of option outstanding to purchase common stock	22,974,097
Common stock shares reserved for future issuance	45,948,195
Share reserve percent	5.00%
Semnur 2025 Plan \| Common Stock [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Common stock, shares issued	2,400,000
Semnur 2025 Plan \| Maximum
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Stock issued for services, shares	137,844,585
Semnur 2025 Plan \| ESPP [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Common stock shares reserved for future issuance	2,297,409
Shares issued under ESPP, shares	2,871,761
Purchase price of the common stock percentage	85.00%
Share reserve percent	1.00%
Retainer Shares
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Stock issued for services, shares		10,000,000
Shares Exchanged for Share		12,500,000