XML 76 R61.htm IDEA: XBRL DOCUMENT
v3.22.1

Liability Related to the Sale of Future Royalties- Additional Information (Detail) | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2021 USD ($) | Dec. 31, 2022 USD ($) | Oct. 19, 2021 USD ($)
Deferred Revenue Arrangement [Line Items] |  |  |
Proceeds from sale of future royalties, gross | $ 50,000,000.0 |  |
Royalty issuance cost | 2,500,000 |  |
Derivative liability | $ 802,000 |  |
Maximum [Member] |  |  |
Deferred Revenue Arrangement [Line Items] |  |  |
Percentage of annual net revenues | 14.00% |  |
Minimum [Member] |  |  |
Deferred Revenue Arrangement [Line Items] |  |  |
Percentage of annual net revenues | 1.50% |  |
HCR [Member] |  |  |
Deferred Revenue Arrangement [Line Items] |  |  |
Purchase price | $ 125,000,000.0 |  |
Initial investment amount | $ 13,500 |  | $ 50,000,000.0
Description of net investment hedge activity | Under the Revenue Interest Agreement, HCR is entitled to receive tiered royalties on: (i) worldwide net sales of Included Products (as defined below) by the Company (and excluding sales by licensees), and (ii) any payments received by licensees, in each case of tebipenem HBr, SPR720, SPR206 and any other products marketed by the Company (the “Included Products”) in amounts ranging from 12% to 1% based on annual net revenues (or 14% to 1.5% if the Third Investment Amount is funded). The applicable royalty rate is subject to a step-down if certain sales milestones are met. When HCR has received aggregate payments equal to 250% of the Investment Amount (the “Hard Cap”), HCR’s right to receive royalties on Net Revenues will terminate. The Hard Cap will be $250 million upon tebipenem HBr approval, or $312.5 million if the Third Investment Amount is funded. If the Company has not received FDA approval for tebipenem HBr for a cUTI indication on or prior to December 31, 2022, the Revenue Interest Agreement will terminate and the Company will pay to HCR, no later than January 15, 2023, an amount equal to the Initial Investment Amount plus interest equal to an annual 13.5% rate of return. If HCR has not received aggregate payments of at least 60% of the Investment Amount by September 30, 2025 and at least 100% of the Investment Amount by September 30, 2027 (each, a “Minimum Amount”), then the Company will be obligated to make a cash payment to HCR in an amount sufficient to gross HCR up to the applicable Minimum Amount. |  |
Hard capital amount | $ 250,000,000 |  |
Investment amount funded | $ 312,500,000 |  |
Percent of aggregate payment received | 250.00% |  |
Percent of minimum aggregate payment received | 1 |  |
Date Of Minimum Aggregate Payment Received Threshold | Sep. 30, 2027 |  |
Proceeds from sale of future royalties, gross | $ 50,000,000 |  |
Royalty issuance cost | (2,460,000) |  |
Derivative liability | $ 1,006,000 |  |
Effective interest rate | 20.80% |  |
Percentage of conditional obligation in case of default | 2.50 |  |
HCR [Member] | Forecast [Member] |  |  |
Deferred Revenue Arrangement [Line Items] |  |  |
Additional investment amount |  | $ 50,000,000.0 |
Alternative investment |  | $ 25,000,000.0 |
HCR [Member] | Maximum [Member] |  |  |
Deferred Revenue Arrangement [Line Items] |  |  |
Percentage of annual net revenues | 12.00% |  |
HCR [Member] | Minimum [Member] |  |  |
Deferred Revenue Arrangement [Line Items] |  |  |
Percentage of annual net revenues | 1.00% |  |
Percent of minimum aggregate payment received | 0.60 |  |
Date Of Minimum Aggregate Payment Received Threshold | Sep. 30, 2025 |  |

X
- Definition Additional investment amount + References No definition available. + Details
Name: | spro_AdditionalInvestmentAmount
Namespace Prefix: | spro_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Date Of Minimum Aggregate Payment Received Threshold + References No definition available. + Details
Name: | spro_DateOfMinimumAggregatePaymentReceivedThreshold
Namespace Prefix: | spro_
Data Type: | xbrli:dateItemType
Balance Type: | na
Period Type: | instant

X
- Definition Hard capital amount + References No definition available. + Details
Name: | spro_HardCapitalAmount
Namespace Prefix: | spro_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Initial investment amount + References No definition available. + Details
Name: | spro_InitialInvestmentAmount
Namespace Prefix: | spro_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Investment amount funded + References No definition available. + Details
Name: | spro_InvestmentAmountFunded
Namespace Prefix: | spro_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Percent of aggregate payment received + References No definition available. + Details
Name: | spro_PercentOfAggregatePaymentReceived
Namespace Prefix: | spro_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percent Of Minimum Aggregate Payment Received Threshold + References No definition available. + Details
Name: | spro_PercentOfMinimumAggregatePaymentReceivedThreshold
Namespace Prefix: | spro_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage of annual net revenues. + References No definition available. + Details
Name: | spro_PercentageOfAnnualNetRevenues
Namespace Prefix: | spro_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage of Conditional Obligation. + References No definition available. + Details
Name: | spro_PercentageOfConditionalObligation
Namespace Prefix: | spro_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | instant

X
- Definition Royalty issuance cost. + References No definition available. + Details
Name: | spro_RoyaltyIssuanceCost
Namespace Prefix: | spro_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Fair value of investment other than investment in equity security, investment in debt security and equity method investment. Includes, but is not limited to, investment in certain entities that calculate net asset value per share. Example includes, but is not limited to, investment in hedge fund, venture capital fund, private equity fund, and real estate partnership or fund. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 6A -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123874694&loc=SL6742756-110258 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 35 -Paragraph 54B -URI http://asc.fasb.org/extlink&oid=122636397&loc=SL7495116-110257 + Details
Name: | us-gaap_AlternativeInvestment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The average effective interest rate during the reporting period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=124435984&loc=d3e28551-108399 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 1F -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123466505&loc=SL123495355-112611 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
Name: | us-gaap_DebtInstrumentInterestRateDuringPeriod
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition 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. + References No definition available. + Details
Name: | us-gaap_DeferredRevenueArrangementLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities not subject to a master netting arrangement and not elected to be offset. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=99393222&loc=SL20226008-175313 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=123594938&loc=d3e13433-108611 Reference 4: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 22 -URI http://asc.fasb.org/extlink&oid=99393222&loc=SL20226052-175313 + Details
Name: | us-gaap_DerivativeLiabilities
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Contains all pertinent information about an entity's hedges of the foreign currency exposure of net investments in foreign operations. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (b),(c),(d) -URI http://asc.fasb.org/extlink&oid=125515794&loc=SL5624171-113959 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1B -URI http://asc.fasb.org/extlink&oid=125515794&loc=SL5580258-113959 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=125515794&loc=d3e41620-113959 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=125515794&loc=SL5579240-113959 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1A -URI http://asc.fasb.org/extlink&oid=125515794&loc=SL5579245-113959 Reference 6: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=125515794&loc=d3e41641-113959 + Details
Name: | us-gaap_DescriptionOfNetInvestmentHedgeActivity
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Cash received for royalties during the current period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 25 -Subparagraph (a),(c) -URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3536-108585 + Details
Name: | us-gaap_ProceedsFromRoyaltiesReceived
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition A device of credit enhancement where a part of the purchase price for the receivable/ payable is retained to serve as a cash collateral. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=123431023&loc=d3e4332-108586 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=123431023&loc=d3e4304-108586 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=123431023&loc=d3e4313-108586 + Details
Name: | us-gaap_SupplementalDeferredPurchasePrice
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=spro_HealthcareRoyaltyManagementLlcMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementScenarioAxis=srt_ScenarioForecastMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |