Represents the percentage of the finished goods inventory valued on a first in first out basis.

No definition available.

Name:	akrx_DebtInstrumentBorrowingBasePercentFinishedGoods
Namespace Prefix:	akrx_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

The borrowing base component presented as a percent of accounts receivable.

+ References

No definition available.

+ Details

Name:	akrx_DebtInstrumentBorrowingBasePercentOfEligibleAccountsReceivable
Namespace Prefix:	akrx_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Represents the percentage of the liquidation value of the eligible inventory.

+ References

No definition available.

+ Details

Name:	akrx_DebtInstrumentBorrowingBasePercentOfEligibleInventoryLiquidationValue
Namespace Prefix:	akrx_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Debt Instrument, Borrowing Base, Percent Of Liquidation Of Finished Goods

+ References

No definition available.

+ Details

Name:	akrx_DebtInstrumentBorrowingBasePercentOfLiquidationOfFinishedGoods
Namespace Prefix:	akrx_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Represents the orderly liquidation value of eligible raw materials and work in process valued on a first in first out basis.

+ References

No definition available.

+ Details

Name:	akrx_DebtInstrumentBorrowingBasePercentOfLiquidationValue
Namespace Prefix:	akrx_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Represents the market value of the finished goods.

+ References

No definition available.

+ Details

Name:	akrx_DebtInstrumentBorrowingBasePercentOfMarketValueFinishedGoods
Namespace Prefix:	akrx_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Represents the percentage of eligible raw materials and work in process inventory valued on a first in first out basis.

+ References

No definition available.

+ Details

Name:	akrx_DebtInstrumentBorrowingBasePercentOfMaterialsAndWIPOnFIFO
Namespace Prefix:	akrx_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

The minimum ratio of EBITDA to fixed charges that the borrower can maintain in accordance with the debt covenants

+ References

No definition available.

+ Details

Name:	akrx_DebtInstrumentCovenantMinimumEBITDAtoFixedChargesRatio
Namespace Prefix:	akrx_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	instant

- Definition

The trailing measurement duration for the minimum ratio of EBITDA to fixed charges that the borrower can maintain in accordance with the debt covenants

+ References

No definition available.

+ Details

Name:	akrx_DebtInstrumentCovenantMinimumEBITDAtoFixedChargesRatioRollingQuarterlyMeasurmentDuration
Namespace Prefix:	akrx_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

The minimum amount of liquidity that the borrower can maintain in accordance with the debt covenants.

+ References

No definition available.

+ Details

Name:	akrx_DebtInstrumentCovenantMinimumLiquidity
Namespace Prefix:	akrx_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The additional commitment percentage that is added to the minimum amount of liquidity that the borrower can maintain in accordance with the debt covenants.

+ References

No definition available.

+ Details

Name:	akrx_DebtInstrumentCovenantMinimumLiquidityAdditionalPercentageOfCommitments
Namespace Prefix:	akrx_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

The increase in the interest rate in the event the borrower defaults on the debt.

+ References

No definition available.

+ Details

Name:	akrx_DebtInstrumentDebtDefaultRateIncrease
Namespace Prefix:	akrx_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

The percent of the initial loan amount that is required as a periodic payments of both interest and principal.

+ References

No definition available.

+ Details

Name:	akrx_DebtInstrumentPeriodicPaymentPercentOfInitialLoanAmount
Namespace Prefix:	akrx_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

The potential reduction in the basis spread on variable rate debt if certain criteria is met.

+ References

No definition available.

+ Details

Name:	akrx_DebtInstrumentPotentialReductionInBasisSpreadOnVariableRate
Namespace Prefix:	akrx_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

The EBITDA ratio threshold that must be met for the potential reduction in the basis spread on variable rate to take effect.

+ References

No definition available.

+ Details

Name:	akrx_DebtInstrumentPotentialReductioninBasisSpreadonVariableRateEBITDARatioThreshold
Namespace Prefix:	akrx_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	instant

- Definition

The number of outstanding letters of credit.

+ References

No definition available.

+ Details

Name:	akrx_LettersOfCreditOutstandingNumber
Namespace Prefix:	akrx_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

The amount of commitments threshold which triggers a commitment fee.

+ References

No definition available.

+ Details

Name:	akrx_LineOfCreditFacilityCommitmentFeeThresholdAmountOfCommitments
Namespace Prefix:	akrx_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The number of consecutive days under the commitments threshold which triggers a commitment fee.

+ References

No definition available.

+ Details

Name:	akrx_LineOfCreditFacilityCommitmentFeeThresholdNumberOfConsecutiveDays
Namespace Prefix:	akrx_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

The percent of commitments threshold which triggers a commitment fee.

+ References

No definition available.

+ Details

Name:	akrx_LineOfCreditFacilityCommitmentFeeThresholdPercentOfCommitments
Namespace Prefix:	akrx_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Potential increase to the maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

No definition available.

+ Details

Name:	akrx_LineOfCreditFacilityPotentialIncreaseToMaximumBorrowingCapacity
Namespace Prefix:	akrx_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Potential maximum borrowing capacity of a credit facility after seeking additional commitments from lenders.

+ References

No definition available.

+ Details

Name:	akrx_LineOfCreditFacilityPotentialMaximumBorrowingCapacity
Namespace Prefix:	akrx_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of noncash expense included in interest expense to issue debt and obtain financing associated with the related debt instruments. Alternate captions include noncash interest expense.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3602-108585

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.8)
-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 04
-Paragraph 8
-Article 9

+ Details

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

- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

When presenting a range of interest rates, the lowest effective rate for funds borrowed under the debt agreement as of the balance sheet date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-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_DebtInstrumentInterestRateEffectivePercentageRateRangeMinimum
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
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_DebtInstrumentLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- 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

For an unclassified balance sheet, the carrying amount (net of accumulated amortization) as of the balance sheet date of capitalized costs associated with the issuance of debt instruments (for example, legal, accounting, underwriting, printing, and registration costs) that will be charged against earnings over the life of the debt instruments to which such costs pertain.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28555-108399

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.17)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_DeferredFinanceCostsNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of the cost of borrowed funds accounted for as interest expense for debt.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.8)
-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688

+ Details

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

- Definition

The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

+ References

No definition available.

+ Details

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

- Definition

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03.16)
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03.16)
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 19, 20, 22
-Article 5

+ Details

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

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.19(b),22(b))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

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

- Definition

Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.19(b),22(b))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

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

- Definition

The fee, expressed as a percentage of the line of credit facility, for available but unused credit capacity under the credit facility.

+ References

No definition available.

+ Details

Name:	us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The cash outflow for loan and debt issuance costs.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
-URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3291-108585

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Financing Activities
-URI http://asc.fasb.org/extlink&oid=6513228

+ Details

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

- Definition

The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3291-108585

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Financing Activities
-URI http://asc.fasb.org/extlink&oid=6513228

+ Details

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

- Details

Name:	us-gaap_DebtInstrumentAxis=akrx_TermLoanFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_VariableRateAxis=us-gaap_EurodollarMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LineOfCreditFacilityAxis=akrx_JPMorganMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_VariableRateAxis=akrx_AdjustedPrimeAndFederalFundsRateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=akrx_JPMRevolvingFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditFacilityAxis=akrx_IncrementalTermLoanFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditFacilityAxis=akrx_TermLoanFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RangeAxis=us-gaap_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_VariableRateAxis=us-gaap_BaseRateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditFacilityAxis=us-gaap_LineOfCreditMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditFacilityAxis=akrx_JPMRevolvingFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ShortTermDebtTypeAxis=us-gaap_LetterOfCreditMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditFacilityAxis=us-gaap_RevolvingCreditFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditFacilityAxis=us-gaap_LetterOfCreditMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Financing Arrangements - Additional Information (Details)			1 Months Ended	3 Months Ended		12 Months Ended
	Feb. 16, 2016 USD ($)	Apr. 17, 2014 USD ($)	Apr. 17, 2014 USD ($)	Mar. 31, 2017 USD ($) letter_of_credit	Mar. 31, 2016 USD ($)	Dec. 31, 2016 USD ($)	Aug. 12, 2014 USD ($)
Debt Instrument [Line Items]
Amortization of deferred financing costs				$ 1,304,000	$ 6,311,000
Term Loan Facility \| Eurodollar \| JP Morgan
Debt Instrument [Line Items]
Basis spread on variable rate				5.00%
Term Loan Facility \| ABR Spread \| JP Morgan
Debt Instrument [Line Items]
Basis spread on variable rate				4.00%
JPM Revolving Facility \| JP Morgan
Debt Instrument [Line Items]
Debt term		5 years
Annual increase in interest rate in an event of default		2.00%	2.00%
Commitment fee, minimum percentage of commitments		12.50%	12.50%
Commitment fee, minimum amount of commitments		$ 15,000,000.0	$ 15,000,000.0
Commitment fee, number of consecutive days for commitments		30 days
Potential maximum borrowing capacity		$ 200,000,000.0	200,000,000.0
Unused line fee as a percentage		0.25%
Debt covenant, minimum liquidity		$ 120,000,000.0	$ 120,000,000.0
Debt covenant, minimum liquidity, additional percentage of commitments		25.00%	25.00%
Debt covenant, minimum EBITDA to fixed charges ratio		1.00	1.00
Debt covenant, minimum EBITDA to fixed charges ratio, measurement duration			12 months
Incremental Term Loan Facility \| JP Morgan
Debt Instrument [Line Items]
Maximum borrowing capacity							$ 445,000,000.0
Term Loan Facility \| JP Morgan
Debt Instrument [Line Items]
Maximum borrowing capacity		$ 600,000,000.0	$ 600,000,000.0
Potential increase in maximum borrowing capacity		$ 150,000,000.0	$ 150,000,000.0
Quarterly principal repayment as a percent of the initial loan amount		0.25%	0.25%
Potential reduction in basis spread on variable rate		0.25%	0.25%
Annual increase in interest rate in an event of default		2.00%	2.00%
Additional financing costs related to continued restatement of loans						$ 5,100,000
Unamortized deferred financing costs				$ 20,200,000		$ 21,500,000
Amortization of deferred financing costs				1,300,000
Debt interest expense				10,900,000	$ 10,800,000
Term Loan Facility \| Maximum \| JP Morgan
Debt Instrument [Line Items]
Potential reduction in basis spread on variable rate, senior debt to EBITDA ratio		2.25	2.25
Term Loan Facility \| Eurodollar \| JP Morgan
Debt Instrument [Line Items]
Basis spread on variable rate			3.50%
Minimum effective interest rate			4.50%
Term Loan Facility \| Base Rate \| JP Morgan
Debt Instrument [Line Items]
Basis spread on variable rate			2.50%
Line of Credit \| JP Morgan
Debt Instrument [Line Items]
Debt term		7 years
Voluntary prepayment of all future quarterly principal payments	$ (200,000,000)
Amount outstanding				831,900,000
JPM Revolving Facility \| JP Morgan
Debt Instrument [Line Items]
Remaining availability under credit facility				$ 147,800,000
JPM Revolving Facility \| JPM Revolving Facility \| JP Morgan
Debt Instrument [Line Items]
Maximum borrowing capacity		$ 150,000,000.0	$ 150,000,000.0
JPM Revolving Facility \| Letter of Credit \| JP Morgan
Debt Instrument [Line Items]
Number of letters of credit outstanding (in letter of credit) \| letter_of_credit				1
Amount outstanding under credit facility				$ 2,200,000
Revolving Credit Facility \| JPM Revolving Facility \| JP Morgan
Debt Instrument [Line Items]
Borrowing base, percent of eligible accounts receivable		85.00%	85.00%
Borrowing base, percent of materials and WIP on FIFO		65.00%	65.00%
Borrowing base, percent of liquidation value		85.00%	85.00%
Borrowing base, percent finished goods		75.00%	75.00%
Borrowing base, percent of liquidation of finished goods		85.00%	85.00%
Borrowing base, percent of eligible inventory liquidation value		85.00%	85.00%
Borrowing base, percent of market value finished goods		75.00%	75.00%
Letter of Credit \| JPM Revolving Facility \| JP Morgan
Debt Instrument [Line Items]
Maximum borrowing capacity		$ 10,000,000.0	$ 10,000,000.0