Represents amount of consideration for termination of lease.

No definition available.

Name:	otlk_ConsiderationForTerminationOfLease
Namespace Prefix:	otlk_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Period of time between issuance and the initial repayment of debt instrument

+ References

No definition available.

+ Details

Name:	otlk_DebtInstrumentDeferralTerm
Namespace Prefix:	otlk_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Area of property under lease termination.

+ References

No definition available.

+ Details

Name:	otlk_LeaseTerminationAreaOfPropertyUnderLease
Namespace Prefix:	otlk_
Data Type:	num:areaItemType
Balance Type:	na
Period Type:	instant

- Definition

Amount of reduction in cash need from lease termination.

+ References

No definition available.

+ Details

Name:	otlk_LeaseTerminationExpectedReductionInCash
Namespace Prefix:	otlk_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Percentage of consideration late payment percentage

+ References

No definition available.

+ Details

Name:	otlk_LeaseTerminationLatePaymentConsiderationPercentage
Namespace Prefix:	otlk_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Represents terms of payment for lease.

+ References

No definition available.

+ Details

Name:	otlk_TermsOfPaymentForLease
Namespace Prefix:	otlk_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

Reference 1: 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=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentTerm
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of gain (loss) on termination of lease before expiration of lease term.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 40
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=77888415&loc=SL77918607-209975

+ Details

Name:	us-gaap_GainLossOnTerminationOfLease
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The cash inflow during the period from additional borrowings in aggregate debt. Includes proceeds from short-term and long-term debt.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 14
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3255-108585

+ Details

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

- 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

No definition available.

+ Details

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

- Details

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

- Details

Name:	us-gaap_LongtermDebtTypeAxis=otlk_PaycheckProtectionProgramMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Subsequent Event (Details) $ in Millions			1 Months Ended	3 Months Ended
Subsequent Event (Details) $ in Millions	May 06, 2020 USD ($) ft²	May 04, 2020 USD ($)	Aug. 31, 2018 USD ($)	Jun. 30, 2020 USD ($)
Subsequent Event
Consideration for termination of lease			$ 5.8
Terms of payment for lease			30 months
Subsequent Event
Subsequent Event
Area of property under lease termination \| ft²	66,000
Amount of reduction in cash	$ 14.0
Consideration for termination of lease	$ 1.0
Terms of payment for lease	8 months
Percentage of consideration late payment percentage	7.00%
Loss on lease termination				$ (0.6)
Subsequent Event \| Paycheck Protection Program
Subsequent Event
Proceeds from loan		$ 0.9
Deferral term		6 months
Debt Instrument, term		2 years
Interest rate (as a percent)		1.00%