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Stock-Based Compensation - Non-options (Details) - USD ($) $ / shares in Units, $ in Thousands | 1 Months Ended | 3 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Jul. 31, 2024 | Mar. 31, 2025 | Dec. 31, 2024 | Mar. 31, 2024
BTI RSU |  |  |  |
Number of shares |  |  |  |
Outstanding, beginning balance (in shares) |  | 27,000 |  |
Granted (in shares) |  | 3,000 |  |
Vested (in shares) |  | (9,000) |  |
Cancelled (in shares) |  | (1,000) |  |
Outstanding, ending balance (in shares) |  | 20,000 | 27,000 |
Weighted average price |  |  |  |
Unrecognized stock-based compensation expense |  | $ 537 |  | $ 1,308
BTI RSU | RSU vesting 100% at one year anniversary |  |  |  |
Number of shares |  |  |  |
Granted (in shares) |  | 3,000 |  |
Weighted average price |  |  |  |
Granted, Weighted average price (in dollars per share) |  | $ 6.14 |  |
Vesting period |  | 1 year |  |
BTI RSU | RSU vesting 25% at one year and remaining in 12 quarters |  |  |  |
Weighted average price |  |  |  |
Vesting period |  | 4 years |  |
Vesting (as a percent) |  | 25.00% |  |
BTI PSU |  |  |  |
Number of shares |  |  |  |
Outstanding, beginning balance (in shares) |  | 70,000 |  |
Granted (in shares) | 87,000 |  |  |
Vested (in shares) |  | 0 |  |
Cancelled (in shares) |  | (10,000) |  |
Outstanding, ending balance (in shares) |  | 60,000 | 70,000 |
Weighted average price |  |  |  |
Granted, Weighted average price (in dollars per share) | $ 19.2 |  |  |
Vesting period | 1 year |  |  |
Unrecognized stock-based compensation expense |  | $ 0 |  |
OnkosXcel PSU |  |  |  |
Number of shares |  |  |  |
Outstanding, beginning balance (in shares) |  | 1,166 |  |
Granted (in shares) |  | 15 |  |
Cancelled (in shares) |  | (84) |  |
Outstanding, ending balance (in shares) |  | 1,082 | 1,166 |
Vested aggregate (in shares) |  | 976 |  |
Weighted average price |  |  |  |
Outstanding, Weighted average price beginning balance (in dollars per share) |  | $ 5,686 |  |
Cancelled, Weighted average price (in dollars per share) |  | 6,006 |  |
Vested, Weighted average price (in dollars per share) |  | $ 5,533 |  |
Outstanding, Weighted average price ending balance (in dollars per share) |  |  | $ 5,686 |
Vesting period |  | 48 months |  |
Unrecognized stock-based compensation expense |  | $ 319 |  | 782
OnkosXcel RSUs |  |  |  |
Number of shares |  |  |  |
Outstanding, beginning balance (in shares) |  | 176 |  |
Granted (in shares) |  |  | 140 |
Vested (in shares) |  | (2) |  |
Cancelled (in shares) |  | (34) |  |
Outstanding, ending balance (in shares) |  | 140 | 176 |
Weighted average price |  |  |  |
Unrecognized stock-based compensation expense |  | $ 50 |  | $ 420

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- Definition Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a cancelled event. + References No definition available. + Details
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- Definition Amount of cost to be recognized for nonvested award under share-based payment arrangement. Excludes share and unit options. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (i) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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- Definition Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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- Definition The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(01) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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- Definition The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(01) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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- Definition The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(2)(i) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(2)(ii) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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- Definition Per share or unit weighted-average fair value of nonvested award under share-based payment arrangement. Excludes share and unit options. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(2)(i) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(2)(ii) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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- Definition The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(02) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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- Definition Number of fully vested and expected to vest options outstanding that can be converted into shares under option plan. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (e)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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