Represents the additional rentable square feet the entity is obligated to lease under lease agreement.

No definition available.

Name:	depo_AdditionLeaseSpaceObligation
Namespace Prefix:	depo_
Data Type:	num:areaItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the minimum period prior to the lease expiration that written notice must be made to the landlord, if the entity wishes to extend the lease.

+ References

No definition available.

+ Details

Name:	depo_LeaseRenewalAdvanceNoticeRequiredMinimumPeriod
Namespace Prefix:	depo_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the lease renewal option period.

+ References

No definition available.

+ Details

Name:	depo_LeaseRenewalOptionPeriod
Namespace Prefix:	depo_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the rate applied to unamortized remaining lease incentives which may include tenant improvement allowances, waived base rent and leasing commissions and other allowances specified in the lease agreement.

+ References

No definition available.

+ Details

Name:	depo_LeaseTerminationLeaseIncentiveAmortizationRate
Namespace Prefix:	depo_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Represents the number of additional lease renewal terms the entity is entitled to under the lease agreement.

+ References

No definition available.

+ Details

Name:	depo_NumberOfLeaseRenewalTerms
Namespace Prefix:	depo_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Area of a real estate property.

+ References

No definition available.

+ Details

Name:	us-gaap_AreaOfRealEstateProperty
Namespace Prefix:	us-gaap_
Data Type:	num:areaItemType
Balance Type:	na
Period Type:	instant

- Definition

The cumulative difference between the rental payments required by a lease agreement and the rental income or expense recognized on a straight-line basis, or other systematic and rational basis more representative of the time pattern in which use or benefit is granted or derived from the leased property, expected to be recognized in income or expense over the term of the leased property by the lessor or lessee, respectively.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 840

-SubTopic 20

-Section 25

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=7501430&loc=d3e39896-112707

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of rent expense incurred for leased assets, including but not limited to, furniture and equipment, that is not directly or indirectly associated with the manufacture, sale or creation of a product or product line.

+ References

No definition available.

+ Details

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

- Definition

Term of the lessee's leasing arrangement, 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_LesseeLeasingArrangementsOperatingLeasesTermOfContract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Details

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

- Definition

Amount of required minimum rental payments for leases having an initial or remaining non-cancelable letter-terms in excess of one year.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 840

-SubTopic 20

-Section 50

-Paragraph 2

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=6453985&loc=d3e41502-112717

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 840

-SubTopic 10

-Section 55

-Paragraph 40

-Subparagraph (Note 3)

-URI http://asc.fasb.org/extlink&oid=6584154&loc=d3e38371-112697

+ Details

Name:	us-gaap_OperatingLeasesFutureMinimumPaymentsDue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Details

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

- Details

Name:	us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_LeaseAgreementsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_OfficeBuildingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=depo_NewarkMember
Namespace Prefix:
Data Type:	na
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COMMITMENTS AND CONTINGENCIES (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		1 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Apr. 30, 2012 item sqft	Dec. 31, 2013	Dec. 31, 2014
Office and laboratory
Leases
Rent expense	$ 0.3	$ 0.2
Lease of cars
Leases
Rent expense	0.5
New lease Newark
Leases
Square feet agreed to lease			52,500
Additional square feet the Company will lease			8,000
Number of lease renewal terms			1
Lease renewal option period			5 years
Lease renewal, minimum notice period prior to lease expiration			12 months
Lease termination penalty interest (as a percent)			8.00%
Future aggregate amount payable as rent over the remaining term of the lease	11.8
Deferred rent	1.7				1.7
Enterprise
Leases
Future aggregate amount payable as rent over the remaining term of the lease	$ 4.1
Enterprise \| Minimum
Leases
Lease terms				18 months
Enterprise \| Maximum
Leases
Lease terms				36 months