XML 63 R56.htm IDEA: XBRL DOCUMENT v3.25.2

Subsequent Events - Additional Information (Details) $ / shares in Units, $ in Thousands			6 Months Ended
	Aug. 11, 2025 USD ($)	Aug. 08, 2025 $ / shares shares	Jun. 30, 2024 USD ($)	Jun. 30, 2025 $ / shares shares	Dec. 31, 2024 $ / shares	Jul. 10, 2024 shares	Jun. 17, 2024 $ / shares shares	Apr. 08, 2024 $ / shares shares	Dec. 15, 2021 shares
Subsequent Events [Line Items]
Net proceeds from issuance of warrants | $			$ 10,338
Pre Funded Warrant [Member]
Subsequent Events [Line Items]
Warrants exercise price per share (in Dollars per share)								$ 2.349
Common Warrants [Member]
Subsequent Events [Line Items]
Warrants exercise price per share (in Dollars per share)				$ 2.9375				$ 2.35
Warrant term								5 years
Class A Common Stock [Member]
Subsequent Events [Line Items]
Warrant purchase shares | shares				154,894		150,000	3,395,782		238,549
Warrants exercise price per share (in Dollars per share)							$ 2.5
Price per share (in Dollars per share)				$ 0.001	$ 0.001
Warrant term				4 years 6 months			24 months
Class A Common Stock [Member] | Pre Funded Warrant [Member]
Subsequent Events [Line Items]
Warrant purchase shares | shares								1,572,894
Price per share (in Dollars per share)								$ 0.001
Class A Common Stock [Member] | Placement Agent Warrants [Member]
Subsequent Events [Line Items]
Warrant purchase shares | shares				167,982
Warrants exercise price per share (in Dollars per share)				$ 3.25
IPO [Member] | Subsequent Event [Member]
Subsequent Events [Line Items]
Gross proceeds from issuance of warrants | $	$ 5,000
Net proceeds from issuance of warrants | $	$ 4,500
IPO [Member] | Subsequent Event [Member] | Pre Funded Warrant [Member]
Subsequent Events [Line Items]
Warrants exercise price per share (in Dollars per share)		$ 0.849
IPO [Member] | Subsequent Event [Member] | Common Warrants [Member]
Subsequent Events [Line Items]
Warrants exercise price per share (in Dollars per share)		$ 0.85
Common stock and pre-funded warrant conversion features		2.5
Warrant term		24 months
IPO [Member] | Class A Common Stock [Member]
Subsequent Events [Line Items]
Warrant purchase shares | shares								639,872
IPO [Member] | Class A Common Stock [Member] | Subsequent Event [Member]
Subsequent Events [Line Items]
Warrant purchase shares | shares		5,617,648
Warrants number of share conversion | shares		1
IPO [Member] | Class A Common Stock [Member] | Subsequent Event [Member] | Pre Funded Warrant [Member]
Subsequent Events [Line Items]
Warrant purchase shares | shares		264,706
Price per share (in Dollars per share)		$ 0.001
IPO [Member] | Class A Common Stock [Member] | Subsequent Event [Member] | Common Warrants [Member]
Subsequent Events [Line Items]
Warrant purchase shares | shares		14,705,885
Warrants exercise price per share (in Dollars per share)		$ 0.85
IPO [Member] | Class A Common Stock [Member] | Subsequent Event [Member] | Placement Agent Warrants [Member]
Subsequent Events [Line Items]
Warrant purchase shares | shares		411,765
Warrants exercise price per share (in Dollars per share)		$ 1.0625

X

- Definition

Common stock and pre-funded warrant conversion features.

+ References

No definition available.

+ Details

Name:	lgvn_CommonStockAndPre-FundedWarrantConversionFeatures
Namespace Prefix:	lgvn_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Gross proceeds from issuance of warrants.

+ References

No definition available.

+ Details

Name:	lgvn_GrossProceedsFromIssuanceOfWarrants
Namespace Prefix:	lgvn_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Exercise price per share or per unit of warrants or rights outstanding.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
-Section S50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480738/235-10-S50-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08(h)(4))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480678/235-10-S99-1

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481112/505-10-50-3

+ Details

Name:	us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Number of securities into which each warrant or right may be converted. For example, but not limited to, each warrant may be converted into two shares.

+ References

No definition available.

+ Details

Name:	us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByEachWarrantOrRight
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Number of securities into which the class of warrant or right may be converted. For example, but not limited to, 500,000 warrants may be converted into 1,000,000 shares.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481112/505-10-50-3

+ Details

Name:	us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Face amount or stated value per share of common stock.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(29))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

+ Details

Name:	us-gaap_CommonStockParOrStatedValuePerShare
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	instant

X

- Definition

The cash inflow from issuance of rights to purchase common shares at predetermined price (usually issued together with corporate debt).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 45
-Paragraph 14
-Subparagraph (a)
-SubTopic 10
-Topic 230
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482740/230-10-45-14

+ Details

Name:	us-gaap_ProceedsFromIssuanceOfWarrants
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 830
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481674/830-30-50-2

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 855
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483399/855-10-50-2

+ Details

Name:	us-gaap_SubsequentEventLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Period between issuance and expiration of outstanding warrant and right embodying unconditional obligation requiring redemption by transferring asset at specified or determinable date or upon event certain to occur, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (bbb)(2)(i)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (bbb)(2)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (bbb)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

+ Details

Name:	us-gaap_WarrantsAndRightsOutstandingTerm
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	instant

X

- Details

Name:	us-gaap_ClassOfWarrantOrRightAxis=lgvn_PreFundedWarrantMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_ClassOfWarrantOrRightAxis=lgvn_CommonWarrantsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementClassOfStockAxis=us-gaap_CommonClassAMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_ClassOfWarrantOrRightAxis=lgvn_PlacementAgentWarrantsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_SubsidiarySaleOfStockAxis=us-gaap_IPOMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: