XML 41 R29.htm IDEA: XBRL DOCUMENT v3.24.1.1.u2

STOCK-BASED COMPENSATION (Tables)

3 Months Ended

Mar. 31, 2024

STOCK-BASED COMPENSATION [Abstract]

Stock Option Granted

During the three months ended March 31, 2024 and 2023, the Company granted the following stock options (in thousands):

	Three months ended March 31,
	2024				2023
Stock options granted			1,874				212

Weighted-Average Assumptions Used for Stock Options Granted

The following weighted-average assumptions were used for stock options granted during the three months ended March 31, 2024 and 2023:

		Three months ended March 31,
		2024				2023
Weighted average risk-free rate			4.49	%			3.86	%
Weighted average volatility			99.13	%			95.04	%
Dividend yield			0.00	%			0	%
Expected term		6.08 years				5.36 years

Stock-Based Compensation Expense

For the three months ended March 31, 2024 and 2023, the Company recognized stock-based compensation expense as follows (in thousands):

	Three months ended March 31,
	2024				2023
Research and development		$	46			$	64
General and administrative			236				625
Total		$	282			$	689

X

- Definition

Tabular disclosure for stock option granted during the year.

+ References

No definition available.

+ Details

Name:	erna_ShareBasedPaymentArrangementOptionGrantsInPeriodTableTextBlock
Namespace Prefix:	erna_
Data Type:	dtr-types:textBlockItemType
Balance Type:	na
Period Type:	duration

X

- References

No definition available.

+ Details

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

X

- Definition

Tabular disclosure of allocation of amount expensed and capitalized for award under share-based payment arrangement to statement of income or comprehensive income and statement of financial position. Includes, but is not limited to, corresponding line item in financial statement.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (h)(1)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480429/718-10-50-2

+ Details

Name:	us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTextBlock
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:textBlockItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 718
-SubTopic 10
-Subparagraph (f)(2)
-Name Accounting Standards Codification
-Paragraph 2
-Section 50
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480429/718-10-50-2

+ Details

Name:	us-gaap_ScheduleOfShareBasedPaymentAwardStockOptionsValuationAssumptionsTableTextBlock
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:textBlockItemType
Balance Type:	na
Period Type:	duration