Represents the milestone payment received by the entity during the period.

No definition available.

Name:	depo_MilestonePaymentReceived
Namespace Prefix:	depo_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The number of performance obligations the Company has under the agreement.

+ References

No definition available.

+ Details

Name:	depo_NumberOfPerformanceObligations
Namespace Prefix:	depo_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Represents the upfront agreement fees, initial product formulation work and milestone payments received by the entity during the period.

+ References

No definition available.

+ Details

Name:	depo_UpfrontAgreementFeesInitialProductFormulationWorkAndMilestonePaymentsReceived
Namespace Prefix:	depo_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

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

- Definition

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 32
-Paragraph 2A
-URI http://asc.fasb.org/extlink&oid=82859839&loc=SL82860478-203043

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=82913847&loc=SL49130543-203045

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=82913847&loc=SL49130539-203045

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=82913847&loc=SL49130545-203045

+ Details

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

- Details

Name:	us-gaap_CounterpartyNameAxis=depo_IronwoodPharmaceuticalsIncMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ProductOrServiceAxis=depo_MilestoneMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

REVENUE - Collaboration and License Agreements (Details) $ in Thousands	1 Months Ended	3 Months Ended		6 Months Ended		84 Months Ended
	Mar. 31, 2014 USD ($)	Jun. 30, 2018 USD ($) item	Jun. 30, 2017 USD ($)	Jun. 30, 2018 USD ($) item	Jun. 30, 2017 USD ($)	Jun. 30, 2018 USD ($) item
Collaboration and License Agreements
Total revenues		$ 63,274		$ 191,678	$ 190,904
Ironwood Pharmaceuticals, Inc.
Collaboration and License Agreements
Upfront fees, initial product formulation work and milestone payments received						$ 3,400
Milestone payment received	$ 1,000
Number of performance obligations \| item		2		2		2
Ironwood Pharmaceuticals, Inc. \| Milestone Revenues
Collaboration and License Agreements
Total revenues		$ 5,000	$ 0		$ 0