$TSVT
2Seventy Bio Inc Stock $tsvt

$tsvt Overview Financials Valuation SEC Filings Company Website

2024 Q1 Form 10-K Financial Statement

#000186078224000027 Filed on March 07, 2024

Income Statement

Concept	2024 Q1	2023 Q4	2023
Revenue	$12.44M	$10.68M	$100.4M
YoY Change	-70.12%	-80.98%	9.72%
Cost Of Revenue	$0.00	$3.147M	$2.099M
YoY Change	-100.0%	-79.46%	21.61%
Gross Profit	$12.44M	$7.537M	$98.29M
YoY Change	-69.66%	-81.55%	9.49%
Gross Profit Margin	100.0%	70.54%	97.91%
Selling, General & Admin	$12.66M	$16.20M	$69.41M
YoY Change	-38.9%	-13.37%	-12.63%
% of Gross Profit	101.8%	214.95%	70.62%
Research & Development	$43.93M	$51.22M	$230.8M
YoY Change	-35.63%	3.86%	-7.23%
% of Gross Profit	353.29%	679.54%	234.78%
Depreciation & Amortization	$2.107M	$3.030M	$10.29M
YoY Change	-6.56%	30.32%	-10.82%
% of Gross Profit	16.94%	40.2%	10.46%
Operating Expenses	$56.59M	$67.47M	$300.2M
YoY Change	-36.39%	-0.87%	-8.54%
Operating Profit	-$51.15M	-$59.94M	-$237.6M
YoY Change	-1.08%	120.26%	-9.7%
Interest Expense	$2.861M	$3.648M	$12.41M
YoY Change	39.63%	144.67%	323.36%
% of Operating Profit
Other Income/Expense, Net	$646.0K	-$534.0K	$7.625M
YoY Change	-75.56%	-120.85%	25.93%
Pretax Income	-$52.67M	-$56.82M	-$217.6M
YoY Change	12.02%	145.35%	-14.39%
Income Tax	$0.00		$0.00
% Of Pretax Income
Net Earnings	-$52.70M	-$56.82M	-$217.6M
YoY Change	12.13%	145.53%	-14.39%
Net Earnings / Revenue	-423.8%	-531.84%	-216.73%
Basic Earnings Per Share	-$1.01		-$4.42
Diluted Earnings Per Share	-$1.01	-$1.11	-$4.42
COMMON SHARES
Basic Shares Outstanding	51.31M shares	50.62M shares	49.28M shares
Diluted Shares Outstanding	52.07M shares		49.28M shares

Balance Sheet

Concept	2024 Q1	2023 Q4	2023
SHORT-TERM ASSETS
Cash & Short-Term Investments	$181.4M	$217.0M	$217.0M
YoY Change	-46.64%	-18.51%	-18.51%
Cash & Equivalents	$56.79M	$74.96M	$74.96M
Short-Term Investments	$124.6M	$142.0M	$142.0M
Other Short-Term Assets	$19.48M	$7.365M	$7.365M
YoY Change	125.63%	-46.05%	-46.05%
Inventory
Prepaid Expenses	$6.697M	$7.365M
Receivables	$11.98M	$13.41M	$13.41M
Other Receivables	$0.00	$0.00	$0.00
Total Short-Term Assets	$212.8M	$237.8M	$237.8M
YoY Change	-45.4%	-20.98%	-20.98%
LONG-TERM ASSETS
Property, Plant & Equipment	$38.23M	$58.15M	$278.1M
YoY Change	-35.36%	4.33%	-6.24%
Goodwill		$0.00
YoY Change		-100.0%
Intangibles	$6.417M	$6.594M
YoY Change	-9.94%	-9.7%
Long-Term Investments	$0.00	$4.816M	$4.816M
YoY Change	-100.0%	240.59%	240.59%
Other Assets	$38.24M	$38.14M	$38.14M
YoY Change	1.73%	-0.65%	-0.65%
Total Long-Term Assets	$298.2M	$327.7M	$327.7M
YoY Change	-15.43%	-7.9%	-7.9%
TOTAL ASSETS
Total Short-Term Assets	$212.8M	$237.8M	$237.8M
Total Long-Term Assets	$298.2M	$327.7M	$327.7M
Total Assets	$511.1M	$565.4M	$565.4M
YoY Change	-31.17%	-13.89%	-13.89%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$8.801M	$6.028M	$6.028M
YoY Change	-34.32%	-16.37%	-16.37%
Accrued Expenses	$35.27M	$38.35M	$38.35M
YoY Change	-35.93%	-41.76%	-41.76%
Deferred Revenue	$16.34M	$15.40M
YoY Change	92.64%	413.43%
Short-Term Debt	$0.00	$0.00	$0.00
YoY Change
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$60.41M	$59.78M	$59.78M
YoY Change	-21.48%	-25.08%	-25.08%
LONG-TERM LIABILITIES
Long-Term Debt	$0.00	$0.00	$0.00
YoY Change
Other Long-Term Liabilities	$685.0K	$2.416M	$250.3M
YoY Change	-71.47%	0.79%	-6.03%
Total Long-Term Liabilities	$685.0K	$2.416M	$250.3M
YoY Change	-71.47%	0.79%	-6.03%
TOTAL LIABILITIES
Total Short-Term Liabilities	$60.41M	$59.78M	$59.78M
Total Long-Term Liabilities	$685.0K	$2.416M	$250.3M
Total Liabilities	$303.6M	$310.1M	$310.1M
YoY Change	-10.99%	-10.42%	-10.42%
SHAREHOLDERS EQUITY
Retained Earnings	-$563.9M	-$511.2M
YoY Change	65.52%	74.09%
Common Stock	$5.000K	$5.000K
YoY Change	0.0%	25.0%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$207.4M	$255.3M	$255.3M
YoY Change
Total Liabilities & Shareholders Equity	$511.1M	$565.4M	$565.4M
YoY Change	-31.17%	-13.89%	-13.89%

Cashflow Statement

Concept	2024 Q1	2023 Q4	2023
OPERATING ACTIVITIES
Net Income	-$52.70M	-$56.82M	-$217.6M
YoY Change	12.13%	145.53%	-14.39%
Depreciation, Depletion And Amortization	$2.107M	$3.030M	$10.29M
YoY Change	-6.56%	30.32%	-10.82%
Cash From Operating Activities	-$41.90M	-$63.60M	-$166.9M
YoY Change	-14.66%	14.63%	-29.62%
INVESTING ACTIVITIES
Capital Expenditures	$612.0K	$1.071M	$13.87M
YoY Change	-89.93%	-66.17%	-39.3%
Acquisitions
YoY Change
Other Investing Activities	$22.45M	$48.96M	$57.73M
YoY Change	-55.88%	1758.81%	67.13%
Cash From Investing Activities	$21.83M	$47.89M	$43.86M
YoY Change	-51.26%	-9101.88%	274.98%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net			$9.859M
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	$386.0K	253.0K	$127.4M
YoY Change	-99.7%	9.05%	-23.36%
NET CHANGE
Cash From Operating Activities	-$41.90M	-63.60M	-$166.9M
Cash From Investing Activities	$21.83M	47.89M	$43.86M
Cash From Financing Activities	$386.0K	253.0K	$127.4M
Net Change In Cash	-$19.66M	-15.45M	$4.393M
YoY Change	-116.01%	-72.3%	-107.42%
FREE CASH FLOW
Cash From Operating Activities	-$41.90M	-$63.60M	-$166.9M
Capital Expenditures	$612.0K	$1.071M	$13.87M
Free Cash Flow	-$42.51M	-$64.67M	-$180.8M
YoY Change	-22.96%	10.26%	-30.47%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
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CY2023	dei	Document Period End Date DocumentPeriodEndDate	2023-12-31
CY2023	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2023	dei	Document Transition Report DocumentTransitionReport	false
CY2023	dei	Entity File Number EntityFileNumber	001-40791
CY2023	dei	Entity Registrant Name EntityRegistrantName	2seventy bio, Inc.
CY2023	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	DE
CY2023	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	86-3658454
CY2023	dei	Entity Address Address Line1 EntityAddressAddressLine1	60 Binney Street
CY2023	dei	Entity Address City Or Town EntityAddressCityOrTown	Cambridge
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CY2021	us-gaap	Share Based Compensation ShareBasedCompensation	54629000	usd
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CY2023	dei	Entity Central Index Key EntityCentralIndexKey	0001860782
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CY2023	dei	Security12b Title Security12bTitle	Common Stock, par value $0.0001 per share
CY2023	dei	Trading Symbol TradingSymbol	TSVT
CY2023	dei	Security Exchange Name SecurityExchangeName	NASDAQ
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CY2021	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	21647000	usd
CY2023	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-217570000	usd
CY2022	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-254153000	usd
CY2023	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	0	usd
CY2022	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	0	usd
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	0	usd
CY2023	us-gaap	Net Income Loss NetIncomeLoss	-217570000	usd
CY2021	us-gaap	Net Income Loss NetIncomeLoss	-292213000	usd
CY2023	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-4.42
CY2022	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-7.13
CY2022	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-7.13
CY2021	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-12.44
CY2023	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	49276000	shares
CY2023	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	49276000	shares
CY2022	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	35637000	shares
CY2022	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	35637000	shares
CY2021	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	23499000	shares
CY2021	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	23499000	shares
CY2023	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	0	usd
CY2022	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	0	usd
CY2021	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	0	usd
CY2023	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	2673000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-2165000	usd
CY2021	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-712000	usd
CY2023	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	2673000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-2165000	usd
CY2021	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-712000	usd
CY2023	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-214897000	usd
CY2022	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-256318000	usd
CY2021	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-292925000	usd
CY2020Q4	us-gaap	Stockholders Equity StockholdersEquity	74629000	usd
CY2021	tsvt	Share Based Payment Arrangement Increase For Cost Recognition From Parent ShareBasedPaymentArrangementIncreaseForCostRecognitionFromParent	44626000	usd
CY2021	tsvt	Transfers From Transfers To Net Parent Investment TransfersFromTransfersToNetParentInvestment	517706000	usd
CY2021	tsvt	Stock Issued During Period Value Consummation Of Spin Off Transaction StockIssuedDuringPeriodValueConsummationOfSpinOffTransaction	0	usd
CY2021	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	9012000	usd
CY2021	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	6544000	usd
CY2021	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-482000	usd
CY2021Q4	us-gaap	Stockholders Equity StockholdersEquity	359822000	usd
CY2022	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	17000	usd
CY2022	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	165533000	usd
CY2022	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	41040000	usd
CY2022	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	372000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-2165000	usd
CY2022	us-gaap	Net Income Loss NetIncomeLoss	-254153000	usd
CY2022Q4	us-gaap	Stockholders Equity StockholdersEquity	310466000	usd
CY2023	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	7000	usd
CY2023	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	117004000	usd
CY2023	us-gaap	Stock Issued During Period Value Other StockIssuedDuringPeriodValueOther	9859000	usd
CY2023	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	32159000	usd
CY2023	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	702000	usd
CY2023	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	2673000	usd
CY2023	us-gaap	Net Income Loss NetIncomeLoss	-217570000	usd
CY2023Q4	us-gaap	Stockholders Equity StockholdersEquity	255300000	usd
CY2023	us-gaap	Net Income Loss NetIncomeLoss	-217570000	usd
CY2021	us-gaap	Net Income Loss NetIncomeLoss	-292213000	usd
CY2023	us-gaap	Business Combination Contingent Consideration Arrangements Change In Amount Of Contingent Consideration Liability1 BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1	235000	usd
CY2022	us-gaap	Business Combination Contingent Consideration Arrangements Change In Amount Of Contingent Consideration Liability1 BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1	232000	usd
CY2021	us-gaap	Business Combination Contingent Consideration Arrangements Change In Amount Of Contingent Consideration Liability1 BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1	439000	usd
CY2023	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	10285000	usd
CY2022	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	11533000	usd
CY2021	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	16350000	usd
CY2023	us-gaap	Share Based Compensation ShareBasedCompensation	32159000	usd
CY2022	us-gaap	Share Based Compensation ShareBasedCompensation	41040000	usd
CY2023	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	12056000	usd
CY2022	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0	usd
CY2021	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0	usd
CY2023	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	6627000	usd
CY2022	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-85000	usd
CY2021	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-430000	usd
CY2023	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	-15735000	usd
CY2022	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	7332000	usd
CY2021	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	-1757000	usd
CY2023	tsvt	Increase Decrease In Operating Lease Right Of Use Asset IncreaseDecreaseInOperatingLeaseRightOfUseAsset	20927000	usd
CY2022	tsvt	Increase Decrease In Operating Lease Right Of Use Asset IncreaseDecreaseInOperatingLeaseRightOfUseAsset	34649000	usd
CY2021	tsvt	Increase Decrease In Operating Lease Right Of Use Asset IncreaseDecreaseInOperatingLeaseRightOfUseAsset	15541000	usd
CY2023	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	-423000	usd
CY2022	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	327000	usd
CY2023	us-gaap	Increase Decrease In Accrued Liabilities And Other Operating Liabilities IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities	-27713000	usd
CY2021	us-gaap	Increase Decrease In Operating Lease Liability IncreaseDecreaseInOperatingLeaseLiability	-16199000	usd
CY2022	us-gaap	Increase Decrease In Contract With Customer Liability IncreaseDecreaseInContractWithCustomerLiability	-22762000	usd
CY2021	us-gaap	Increase Decrease In Contract With Customer Liability IncreaseDecreaseInContractWithCustomerLiability	4180000	usd
CY2023	tsvt	Increase Decrease In Collaboration Research Advancement IncreaseDecreaseInCollaborationResearchAdvancement	3744000	usd
CY2022	tsvt	Increase Decrease In Collaboration Research Advancement IncreaseDecreaseInCollaborationResearchAdvancement	19577000	usd
CY2021	tsvt	Increase Decrease In Collaboration Research Advancement IncreaseDecreaseInCollaborationResearchAdvancement	7496000	usd
CY2023	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	-166858000	usd
CY2022	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	-228140000	usd
CY2021	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	-206855000	usd
CY2023	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	13865000	usd
CY2022	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	30810000	usd
CY2021	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	11575000	usd
CY2023	us-gaap	Payments To Acquire Marketable Securities PaymentsToAcquireMarketableSecurities	246743000	usd
CY2021	us-gaap	Proceeds From Sale And Maturity Of Marketable Securities ProceedsFromSaleAndMaturityOfMarketableSecurities	34986000	usd
CY2023	us-gaap	Payments To Acquire Intangible Assets PaymentsToAcquireIntangibleAssets	0	usd
CY2022	us-gaap	Payments To Acquire Intangible Assets PaymentsToAcquireIntangibleAssets	0	usd
CY2021	us-gaap	Payments To Acquire Intangible Assets PaymentsToAcquireIntangibleAssets	8000000	usd
CY2023	us-gaap	Payments To Acquire Restricted Investments PaymentsToAcquireRestrictedInvestments	18430000	usd
CY2022	us-gaap	Payments To Acquire Restricted Investments PaymentsToAcquireRestrictedInvestments	1976000	usd
CY2021	us-gaap	Payments To Acquire Restricted Investments PaymentsToAcquireRestrictedInvestments	32997000	usd
CY2023	us-gaap	Proceeds From Sale Of Restricted Investments ProceedsFromSaleOfRestrictedInvestments	18000000	usd
CY2022	us-gaap	Proceeds From Sale Of Restricted Investments ProceedsFromSaleOfRestrictedInvestments	2000000	usd
CY2021	us-gaap	Proceeds From Sale Of Restricted Investments ProceedsFromSaleOfRestrictedInvestments	0	usd
CY2023	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	43861000	usd
CY2022	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	3753000	usd
CY2021	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-17586000	usd
CY2023	us-gaap	Proceeds From Contributions From Parent ProceedsFromContributionsFromParent	0	usd
CY2022	us-gaap	Proceeds From Contributions From Parent ProceedsFromContributionsFromParent	0	usd
CY2021	us-gaap	Proceeds From Contributions From Parent ProceedsFromContributionsFromParent	354889000	usd
CY2023	tsvt	Proceeds From Issuance Of Private Placement Net Of Issuance Costs ProceedsFromIssuanceOfPrivatePlacementNetOfIssuanceCosts	117004000	usd
CY2022	tsvt	Proceeds From Issuance Of Private Placement Net Of Issuance Costs ProceedsFromIssuanceOfPrivatePlacementNetOfIssuanceCosts	0	usd
CY2021	tsvt	Proceeds From Issuance Of Private Placement Net Of Issuance Costs ProceedsFromIssuanceOfPrivatePlacementNetOfIssuanceCosts	0	usd
CY2023	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	9859000	usd
CY2022	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	0	usd
CY2021	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	0	usd
CY2023	us-gaap	Proceeds From Issuance Of Private Placement ProceedsFromIssuanceOfPrivatePlacement	0	usd
CY2022	us-gaap	Proceeds From Issuance Of Private Placement ProceedsFromIssuanceOfPrivatePlacement	165533000	usd
CY2021	us-gaap	Proceeds From Issuance Of Private Placement ProceedsFromIssuanceOfPrivatePlacement	0	usd
CY2023	tsvt	Proceeds From Stock Options Exercised And Stock Plans ProceedsFromStockOptionsExercisedAndStockPlans	527000	usd
CY2022	tsvt	Proceeds From Stock Options Exercised And Stock Plans ProceedsFromStockOptionsExercisedAndStockPlans	696000	usd
CY2021	tsvt	Proceeds From Stock Options Exercised And Stock Plans ProceedsFromStockOptionsExercisedAndStockPlans	0	usd
CY2023	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	127390000	usd
CY2022	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	166229000	usd
CY2021	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	354889000	usd
CY2023	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	4393000	usd
CY2022	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-58158000	usd
CY2021	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	130448000	usd
CY2022Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	72290000	usd
CY2021Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	130448000	usd
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	0	usd
CY2023Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	76683000	usd
CY2022Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	72290000	usd
CY2021Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	130448000	usd
CY2023Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	74958000	usd
CY2022Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	71032000	usd
CY2021Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	130414000	usd
CY2023Q4	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	1725000	usd
CY2022Q4	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	1258000	usd
CY2021Q4	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	34000	usd
CY2023Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	76683000	usd
CY2022Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	72290000	usd
CY2021Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	130448000	usd
CY2023	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	855000	usd
CY2022	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	2926000	usd
CY2021	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	3703000	usd
CY2023	tsvt	Noncash Or Part Noncash Transfer To Net Parent Investment NoncashOrPartNoncashTransferToNetParentInvestment	0	usd
CY2022	tsvt	Noncash Or Part Noncash Transfer To Net Parent Investment NoncashOrPartNoncashTransferToNetParentInvestment	0	usd
CY2021	tsvt	Noncash Or Part Noncash Transfer To Net Parent Investment NoncashOrPartNoncashTransferToNetParentInvestment	110300000	usd
CY2023	tsvt	Increase Of Right Of Use Asset And Associated Lease Liability Due To Reassessment IncreaseOfRightOfUseAssetAndAssociatedLeaseLiabilityDueToReassessment	0	usd
CY2022	tsvt	Increase Of Right Of Use Asset And Associated Lease Liability Due To Reassessment IncreaseOfRightOfUseAssetAndAssociatedLeaseLiabilityDueToReassessment	0	usd
CY2021	tsvt	Increase Of Right Of Use Asset And Associated Lease Liability Due To Reassessment IncreaseOfRightOfUseAssetAndAssociatedLeaseLiabilityDueToReassessment	174618000	usd
CY2023	us-gaap	Stock Issued1 StockIssued1	0	usd
CY2022	us-gaap	Stock Issued1 StockIssued1	0	usd
CY2021	us-gaap	Stock Issued1 StockIssued1	6544000	usd
CY2023	us-gaap	Nature Of Operations NatureOfOperations	<span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%;padding-left:28.5pt">Description of the business</span><div style="margin-bottom:9pt;text-align:justify;text-indent:18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">2seventy bio, Inc. (the “Company” or “2seventy bio”) is a cell and gene therapy company focused on the research, development, and commercialization of transformative treatments for cancer. The Company’s approach combines its expertise in T cell engineering technology and lentiviral vector gene delivery approaches, experience in research, development, and manufacturing of cell therapies and a suite of technologies that can be selectively deployed to develop highly innovative, targeted cellular therapies for patients with cancer. The Company is advancing multiple preclinical and clinical programs in oncology and, together with BMS, delivering the first FDA-approved CAR T therapy in multiple myeloma, </span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">Abecma</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">, to patients in the United States. Please refer to Note 10, </span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">Collaborative arrangements and strategic partnerships</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">, for further discussion of the collaboration with BMS. </span></div><div style="margin-bottom:9pt;text-align:justify;text-indent:18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">2seventy bio Securities Corporation is a wholly-owned subsidiary of the Company which was incorporated in Massachusetts on December 13, 2021 and was granted securities corporation status in Massachusetts for the 2021 tax year. 2seventy bio Securities Corporation has no employees.</span></div><div style="margin-bottom:9pt;text-align:justify;text-indent:18pt"><span style="background-color:#ffffff;color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">On January 29, 2024, the Company began undertaking a strategic realignment to focus on the development and commercialization of </span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">Abecma. </span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">In connection with the strategic realignment, the Company </span><span style="background-color:#ffffff;color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">entered into an asset purchase agreement with Regeneron Pharmaceuticals, Inc., or Regeneron, to sell to Regeneron substantially all of the assets related to its oncology and autoimmune cell therapy programs</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">. </span><span style="background-color:#ffffff;color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Upon closing of the transaction, which is subject to customary closing conditions, Regeneron will assume all of the ongoing program, infrastructure and personnel costs related to these programs. The transaction is expected to close in the first half of 2024.</span></div><div style="margin-bottom:9pt;text-align:justify;text-indent:18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The Company is subject to risks and uncertainties similar to other companies in the biotechnology industry. There can be no assurance that the Company’s clinical trials will be successfully completed, that it will maintain protection of proprietary technology, or that it will obtain the necessary regulatory approvals for </span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">Abecma </span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">or any future product candidates. Even following approval, </span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">Abecma</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"> or any future product candidates may not be commercially viable. The Company operates in an environment of rapid technological innovation and substantial competition from pharmaceutical and biotechnology companies. Additionally, the Company is dependent on key personnel and on third party organizations such as financial institutions, collaborators, and contract manufacturing organizations. </span></div><div style="margin-bottom:9pt;margin-top:6pt;text-indent:18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">The separation from bluebird bio, Inc.</span></div><div style="margin-bottom:9pt;text-align:justify;text-indent:18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">In January 2021, bluebird bio, Inc. (“bluebird bio”) announced its plans to separate its oncology portfolio and programs from its severe genetic disease portfolio and programs, and spin off its oncology portfolio and programs into a separate, publicly traded company. In furtherance of this plan, 2seventy bio was incorporated as a Delaware corporation in April 2021, and in September 2021, bluebird bio’s board of directors approved the distribution of all of the issued and outstanding shares of 2seventy bio common stock on the basis of one share of 2seventy bio common stock for every three shares of bluebird bio common stock issued and outstanding on October 19, 2021, the record date for the distribution. As a result of the distribution, which occurred on November 4, 2021, 2seventy bio became an independent, publicly traded company.</span></div><div style="margin-bottom:9pt;text-align:justify;text-indent:13.5pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">On November 3, 2021, the Company also entered into a separation agreement with bluebird bio, which is referred to in this annual report as the “Separation Agreement”, as well as various other agreements with bluebird bio, including a tax matters agreement, an employee matters agreement, an intellectual property license agreement, a transition services agreement under which 2seventy bio temporarily receives certain services from bluebird bio, and a second transition services agreement under which 2seventy bio temporarily provides certain services to bluebird bio. These agreements also govern certain of 2seventy bio’s relationships with bluebird bio after the separation. For additional information regarding the Separation Agreement and the other related agreements, refer to Note 14, </span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">Related-party transactions.</span></div><div style="margin-bottom:9pt;margin-top:6pt;text-indent:18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Going concern</span></div><div style="margin-bottom:9pt;text-align:justify;text-indent:18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">In accordance with Accounting Standards Codification (“ASC”) 205-40, </span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">Going Concern</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">, the Company evaluated whether there are conditions and events, considered in the aggregate, that raise substantial doubt about its ability to continue as a going concern within one year after the date that the consolidated and combined financial statements are issued. The Company has incurred losses and has experienced negative operating cash flows for all historical periods presented. During the year ended December 31, 2023, the Company incurred a net loss of $217.6 million and used $166.9 million of cash in operations. The Company expects to continue to generate operating losses and negative operating cash flows for the near future.</span></div><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">As of December 31, 2023, the Company had cash, cash equivalents and marketable securities of $221.8 million. Based on the Company’s current operating plans, including with respect to the ongoing commercialization of </span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">Abecma </span>and not taking into consideration our strategic realignment and the Asset Sale to Regeneron which is expected to close in the first half of 2024, the Company expects that its cash, cash equivalents and marketable securities, will be sufficient to fund current planned operations for at least the next twelve months from the date of filing this Annual Report on Form 10-K. The Company may, in the future, pursue additional cash resources through a combination of public or private equity offerings, debt financings, collaborations, strategic alliances or licensing arrangements with third parties. This includes the potential sale of shares of the Company’s common stock of up to $150.0 million in gross proceeds under the at-the-market, or the ATM, facility established in November 2022 with Cowen and Company, LLC. No sales of common stock have occurred under this ATM as of the date of this Annual Report on Form 10-K and the Company does not currently have any plans to sell shares under the ATM.
CY2023	us-gaap	Net Income Loss NetIncomeLoss	-217600000	usd
CY2023	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	-166900000	usd
CY2023Q4	tsvt	Cash Cash Equivalents And Marketable Securities CashCashEquivalentsAndMarketableSecurities	221800000	usd
CY2021	us-gaap	Proceeds From Contributions From Parent ProceedsFromContributionsFromParent	354900000	usd
CY2021Q4	tsvt	Spinoff Transaction Recognized Identifiable Assets Acquired And Liabilities Assumed Net SpinoffTransactionRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet	384500000	usd
CY2022	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	7332000	usd
CY2022	us-gaap	Increase Decrease In Accrued Liabilities And Other Operating Liabilities IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities	-140000	usd
CY2022	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	-228140000	usd
CY2022	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	30810000	usd
CY2022	us-gaap	Payments To Acquire Restricted Investments PaymentsToAcquireRestrictedInvestments	1976000	usd
CY2022	us-gaap	Proceeds From Sale Of Restricted Investments ProceedsFromSaleOfRestrictedInvestments	2000000	usd
CY2022	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	3753000	usd
CY2022	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-58158000	usd
CY2021Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	130448000	usd
CY2022Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	72290000	usd
CY2022Q4	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	1258000	usd
CY2022Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	72290000	usd
CY2021	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	-1757000	usd
CY2021	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	-206855000	usd
CY2021	us-gaap	Payments To Acquire Restricted Investments PaymentsToAcquireRestrictedInvestments	32997000	usd
CY2021	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-17586000	usd
CY2021	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	130448000	usd
CY2021Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	130448000	usd
CY2021Q4	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	34000	usd
CY2021Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	130448000	usd
CY2023	us-gaap	Use Of Estimates UseOfEstimates	<div style="margin-bottom:9pt;margin-top:6pt;text-indent:18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Use of estimates</span></div><div style="margin-bottom:9pt;text-align:justify;text-indent:18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts in the financial statements and accompanying notes. Actual results could materially differ from those estimates. Management considers many factors in selecting appropriate financial accounting policies and controls, and in developing the estimates and assumptions that are used in the preparation of these financial statements. Management must apply significant judgment in this process. In addition, other factors may affect estimates, including: expected business and operational changes, sensitivity and volatility associated with the assumptions used in developing estimates, and whether historical trends are expected to be representative of future trends. The estimation process often may yield a range of potentially reasonable estimates of the ultimate future outcomes and management must select an amount that falls within that range of reasonable estimates. This process may result in actual results differing materially from those estimated amounts used in the preparation of the financial statements.</span></div><div style="margin-bottom:9pt;text-align:justify;text-indent:18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Estimates and judgments are used in the following areas, among others: allocations of revenue, expenses, assets and liabilities from bluebird bio's historical consolidated financial statements to the Company for periods prior to the separation, future undiscounted cash flows and subsequent fair value estimates used to assess potential and measure any impairment of long-lived assets, including goodwill and intangible assets, the measurement of right-of-use assets and lease liabilities, contingent consideration, stock-based compensation expense, accrued expenses, income taxes, and the assessment of the Company's ability to fund its operations for at least the next twelve months from the date of issuance of these financial statements. In addition, estimates and judgments are used in the Company’s </span></div><div style="margin-bottom:9pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">accounting for its revenue-generating arrangements, in particular as it relates to determining the stand-alone selling price of performance obligations, evaluating whether an option to acquire additional goods and services represents a material right, estimating the total transaction price, including estimating variable consideration and the probability of achieving future potential development and regulatory milestones, assessing the period of performance over which revenue may be recognized, and accounting for modifications to revenue-generating arrangements.</span></div>
CY2023	us-gaap	Concentration Risk Credit Risk ConcentrationRiskCreditRisk	<div style="margin-bottom:9pt;margin-top:6pt;text-indent:18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Concentrations of credit risk and off-balance sheet risk</span></div><div style="margin-bottom:9pt;text-align:justify;text-indent:18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Financial instruments that subject the Company to credit risk primarily consist of cash and cash equivalents, available-for-sale securities, and accounts receivable. Deposits are maintained with banks in the United States and such amounts may exceed the amount of insurance provided on such deposits. The Company has not experienced any losses on such accounts, and does not believe it is exposed to any unusual credit risk beyond the normal credit risk currently associated with commercial banking relationships. Cash deposits are insured by the Federal Deposit Insurance Corporations (“FDIC”) up to $250,000. The Company has cash deposits in excess of the FDIC insured limit. The Company’s marketable securities, which primarily consist of U.S. government agency securities and treasuries, corporate bonds and commercial paper, potentially subject the Company to concentrations of credit risk. The Company has adopted an investment policy that limits the amounts the Company may invest in any one type of investment and requires all investments held by the Company to be at least AA+/Aa1 rated, thereby reducing credit risk exposure. The Company’s accounts receivable balance primarily consists of amounts owed from collaborative arrangement partners and royalties receivable under out-license agreements with various third parties. The Company monitors economic conditions to identify facts or circumstances that may indicate that any of its accounts receivable are at risk of collection.</span></div>
CY2023Q4	us-gaap	Goodwill Impaired Accumulated Impairment Loss GoodwillImpairedAccumulatedImpairmentLoss	12100000	usd
CY2023	tsvt	Contract With Customer Liability Revenue Recognized Including Opening Balance ContractWithCustomerLiabilityRevenueRecognizedIncludingOpeningBalance	71601000	usd
CY2022	tsvt	Contract With Customer Liability Revenue Recognized Including Opening Balance ContractWithCustomerLiabilityRevenueRecognizedIncludingOpeningBalance	32358000	usd
CY2021	tsvt	Contract With Customer Liability Revenue Recognized Including Opening Balance ContractWithCustomerLiabilityRevenueRecognizedIncludingOpeningBalance	26921000	usd
CY2021Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	0	shares
CY2023Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	146754000	usd
CY2023Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	178000	usd
CY2023Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	85000	usd
CY2023Q4	us-gaap	Debt Securities Available For Sale Excluding Accrued Interest DebtSecuritiesAvailableForSaleExcludingAccruedInterest	146847000	usd
CY2022Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	198754000	usd
CY2022Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	6000	usd
CY2022Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	2108000	usd
CY2022Q4	us-gaap	Debt Securities Available For Sale Excluding Accrued Interest DebtSecuritiesAvailableForSaleExcludingAccruedInterest	196652000	usd
CY2023Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months	45850000	usd
CY2023Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	60000	usd
CY2023Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger	1475000	usd
CY2023Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	25000	usd
CY2023Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position DebtSecuritiesAvailableForSaleUnrealizedLossPosition	47325000	usd
CY2023Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Accumulated Loss DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss	85000	usd
CY2022Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months	91385000	usd
CY2022Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	278000	usd
CY2022Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger	88674000	usd
CY2022Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	1830000	usd
CY2022Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position DebtSecuritiesAvailableForSaleUnrealizedLossPosition	180059000	usd
CY2022Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Accumulated Loss DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss	2108000	usd
CY2023Q4	tsvt	Restricted Investments Available For Sale Amortized Cost RestrictedInvestmentsAvailableForSaleAmortizedCost	33072000	usd
CY2023Q4	tsvt	Restricted Investments Available For Sale Accumulated Gross Unrealized Gain Before Tax RestrictedInvestmentsAvailableForSaleAccumulatedGrossUnrealizedGainBeforeTax	67000	usd
CY2023Q4	tsvt	Restricted Investments Available For Sale Accumulated Gross Unrealized Loss Before Tax RestrictedInvestmentsAvailableForSaleAccumulatedGrossUnrealizedLossBeforeTax	365000	usd
CY2023Q4	tsvt	Restricted Investments Available For Sale Excluding Accrued Interest RestrictedInvestmentsAvailableForSaleExcludingAccruedInterest	32774000	usd
CY2022Q4	tsvt	Restricted Investments Available For Sale Amortized Cost RestrictedInvestmentsAvailableForSaleAmortizedCost	32880000	usd
CY2022Q4	tsvt	Restricted Investments Available For Sale Accumulated Gross Unrealized Gain Before Tax RestrictedInvestmentsAvailableForSaleAccumulatedGrossUnrealizedGainBeforeTax	0	usd
CY2022Q4	tsvt	Restricted Investments Available For Sale Accumulated Gross Unrealized Loss Before Tax RestrictedInvestmentsAvailableForSaleAccumulatedGrossUnrealizedLossBeforeTax	1112000	usd
CY2022Q4	tsvt	Restricted Investments Available For Sale Excluding Accrued Interest RestrictedInvestmentsAvailableForSaleExcludingAccruedInterest	31768000	usd
CY2023Q4	tsvt	Restricted Investments Available For Sale Continuous Unrealized Loss Position Less Than12 Months RestrictedInvestmentsAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months	3496000	usd
CY2023Q4	tsvt	Restricted Investments Available For Sale Continuous Loss Position Less Than12 Months Accumulated Loss RestrictedInvestmentsAvailableForSaleContinuousLossPositionLessThan12MonthsAccumulatedLoss	4000	usd
CY2023Q4	tsvt	Restricted Investments Available For Sale Continuous Unrealized Loss Position12 Months Or Longer RestrictedInvestmentsAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger	13266000	usd
CY2023Q4	tsvt	Restricted Investments Available For Sale Continuous Loss Position12 Months Or Longer Accumulated Loss RestrictedInvestmentsAvailableForSaleContinuousLossPosition12MonthsOrLongerAccumulatedLoss	361000	usd
CY2023Q4	tsvt	Restricted Investments Available For Sale Unrealized Loss Position RestrictedInvestmentsAvailableForSaleUnrealizedLossPosition	16762000	usd
CY2023Q4	tsvt	Restricted Investments Available For Sale Unrealized Loss Position Accumulated Loss RestrictedInvestmentsAvailableForSaleUnrealizedLossPositionAccumulatedLoss	365000	usd
CY2022Q4	tsvt	Restricted Investments Available For Sale Continuous Unrealized Loss Position Less Than12 Months RestrictedInvestmentsAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months	1942000	usd
CY2022Q4	tsvt	Restricted Investments Available For Sale Continuous Loss Position Less Than12 Months Accumulated Loss RestrictedInvestmentsAvailableForSaleContinuousLossPositionLessThan12MonthsAccumulatedLoss	27000	usd
CY2022Q4	tsvt	Restricted Investments Available For Sale Continuous Unrealized Loss Position12 Months Or Longer RestrictedInvestmentsAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger	29826000	usd
CY2022Q4	tsvt	Restricted Investments Available For Sale Continuous Loss Position12 Months Or Longer Accumulated Loss RestrictedInvestmentsAvailableForSaleContinuousLossPosition12MonthsOrLongerAccumulatedLoss	1085000	usd
CY2022Q4	tsvt	Restricted Investments Available For Sale Unrealized Loss Position RestrictedInvestmentsAvailableForSaleUnrealizedLossPosition	31768000	usd
CY2022Q4	tsvt	Restricted Investments Available For Sale Unrealized Loss Position Accumulated Loss RestrictedInvestmentsAvailableForSaleUnrealizedLossPositionAccumulatedLoss	1112000	usd
CY2023Q4	us-gaap	Interest Receivable InterestReceivable	800000	usd
CY2022Q4	us-gaap	Interest Receivable InterestReceivable	300000	usd
CY2022	tsvt	Interest Receivable Write Off InterestReceivableWriteOff	0	usd
CY2023	tsvt	Interest Receivable Write Off InterestReceivableWriteOff	0	usd
CY2023	us-gaap	Debt Securities Available For Sale Realized Gain Loss DebtSecuritiesAvailableForSaleRealizedGainLoss	0	usd
CY2022	us-gaap	Debt Securities Available For Sale Realized Gain Loss DebtSecuritiesAvailableForSaleRealizedGainLoss	0	usd
CY2022Q4	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	3655000	usd
CY2023Q4	us-gaap	Accrued Liabilities And Other Liabilities AccruedLiabilitiesAndOtherLiabilities	25688000	usd
CY2022Q4	us-gaap	Accrued Liabilities And Other Liabilities AccruedLiabilitiesAndOtherLiabilities	54678000	usd
CY2023Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	115061000	usd
CY2022Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	103573000	usd
CY2023Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	56911000	usd
CY2022Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	47838000	usd
CY2023Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	58150000	usd
CY2022Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	55735000	usd
CY2023	us-gaap	Depreciation Depreciation	9600000	usd
CY2022	us-gaap	Depreciation Depreciation	8900000	usd
CY2021	us-gaap	Depreciation Depreciation	12100000	usd
CY2023Q4	us-gaap	Accrued Royalties Current AccruedRoyaltiesCurrent	9702000	usd
CY2022Q4	us-gaap	Accrued Royalties Current AccruedRoyaltiesCurrent	13094000	usd
CY2023Q4	tsvt	Accrued Collaboration Research Costs Current AccruedCollaborationResearchCostsCurrent	5681000	usd
CY2022Q4	tsvt	Accrued Collaboration Research Costs Current AccruedCollaborationResearchCostsCurrent	2005000	usd
CY2023Q4	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	4639000	usd
CY2022Q4	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	14845000	usd
CY2023Q4	tsvt	Accrued Manufacturing Costs Current AccruedManufacturingCostsCurrent	1764000	usd
CY2022Q4	tsvt	Accrued Manufacturing Costs Current AccruedManufacturingCostsCurrent	17962000	usd
CY2023Q4	tsvt	Accrued Clinical And Contract Research Organization Costs Current AccruedClinicalAndContractResearchOrganizationCostsCurrent	990000	usd
CY2022Q4	tsvt	Accrued Clinical And Contract Research Organization Costs Current AccruedClinicalAndContractResearchOrganizationCostsCurrent	1619000	usd
CY2023Q4	tsvt	Accrued Property Plant And Equipment Current AccruedPropertyPlantAndEquipmentCurrent	279000	usd
CY2022Q4	tsvt	Accrued Property Plant And Equipment Current AccruedPropertyPlantAndEquipmentCurrent	1498000	usd
CY2023Q4	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	2633000	usd
CY2023Q4	tsvt	Purchase Obligation To Be Paid Year Two And Thereafter PurchaseObligationToBePaidYearTwoAndThereafter	0	usd
CY2023Q4	us-gaap	Purchase Obligation PurchaseObligation	6671000	usd
CY2023Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	200000000	shares
CY2023	us-gaap	Operating Lease Cost OperatingLeaseCost	32636000	usd
CY2022	us-gaap	Operating Lease Cost OperatingLeaseCost	33738000	usd
CY2021	us-gaap	Operating Lease Cost OperatingLeaseCost	24838000	usd
CY2023	us-gaap	Lease Cost LeaseCost	32636000	usd
CY2022	us-gaap	Lease Cost LeaseCost	33738000	usd
CY2021	us-gaap	Lease Cost LeaseCost	24838000	usd
CY2023	us-gaap	Operating Lease Payments OperatingLeasePayments	27927000	usd
CY2022	us-gaap	Operating Lease Payments OperatingLeasePayments	27140000	usd
CY2021	us-gaap	Operating Lease Payments OperatingLeasePayments	25489000	usd
CY2023Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P9Y10M24D
CY2022Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P10Y9M18D
CY2021Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P11Y9M18D
CY2023Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.0548
CY2022Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.0547
CY2021Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.0547
CY2023	us-gaap	Operating Lease Expense OperatingLeaseExpense	43400000	usd
CY2022	us-gaap	Operating Lease Expense OperatingLeaseExpense	43900000	usd
CY2021	us-gaap	Operating Lease Expense OperatingLeaseExpense	34500000	usd
CY2023Q4	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	28672000	usd
CY2023Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	29498000	usd
CY2023Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	32920000	usd
CY2023Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	35086000	usd
CY2023Q4	tsvt	Lessee Operating Lease Liability To Be Paid Year Five And Thereafter LesseeOperatingLeaseLiabilityToBePaidYearFiveAndThereafter	215296000	usd
CY2023Q4	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	341472000	usd
CY2023Q4	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	84799000	usd
CY2023Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	256673000	usd
CY2023Q4	us-gaap	Purchase Obligation Due In Next Twelve Months PurchaseObligationDueInNextTwelveMonths	6671000	usd
CY2023Q4	tsvt	Common Stock Number Of Votes Per Common Share CommonStockNumberOfVotesPerCommonShare	1	vote
CY2023Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	50600000	shares
CY2023Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	50600000	shares
CY2022Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	37900000	shares
CY2022Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	37900000	shares
CY2023Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	10000000	shares
CY2022Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
CY2023Q4	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0	shares
CY2023Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
CY2022Q4	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0	shares
CY2023Q4	us-gaap	Common Stock Capital Shares Reserved For Future Issuance CommonStockCapitalSharesReservedForFutureIssuance	8098000	shares
CY2022Q4	us-gaap	Common Stock Capital Shares Reserved For Future Issuance CommonStockCapitalSharesReservedForFutureIssuance	6689000	shares
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CY2023	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	700000	usd
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CY2023Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Next Twelve Months FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths	708000	usd
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CY2023Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Four FiniteLivedIntangibleAssetsAmortizationExpenseYearFour	708000	usd
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CY2023Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense After Year Five FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive	3054000	usd
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CY2021	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	54629000	usd
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CY2022Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	9266000	usd
CY2023Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	180722000	usd
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CY2023	us-gaap	Valuation Allowance Deferred Tax Asset Change In Amount ValuationAllowanceDeferredTaxAssetChangeInAmount	52700000	usd
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CY2023	tsvt	Unrecognized Tax Benefits Decrease Resulting From Gross Spin Off Adjustment UnrecognizedTaxBenefitsDecreaseResultingFromGrossSpinOffAdjustment	0	usd
CY2023Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	1800000	usd
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CY2023	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	5998000	shares
CY2022	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	3911000	shares
CY2021	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	2570000	shares
CY2022Q4	us-gaap	Restructuring Reserve RestructuringReserve	0	usd
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CY2023Q4	us-gaap	Restructuring Reserve RestructuringReserve	2361000	usd
CY2022Q4	us-gaap	Goodwill Goodwill	12100000	usd
CY2023Q3	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	12100000	usd
CY2022Q4	us-gaap	Goodwill Goodwill	12056000	usd
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CY2023	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	12056000	usd
CY2023Q4	us-gaap	Goodwill Goodwill	0	usd

Files In Submission

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$TSVT
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2024 Q1 Form 10-K Financial Statement

#000186078224000027 Filed on March 07, 2024

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$TSVT 2Seventy Bio Inc Stock $tsvt

2024 Q1 Form 10-K Financial Statement

#000186078224000027 Filed on March 07, 2024

Income Statement

Balance Sheet

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Facts In Submission

Files In Submission

$TSVT
2Seventy Bio Inc Stock $tsvt