Debt instrument increase in interest rate in case of default.

No definition available.

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- Definition

Debt service coverage ratio.

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No definition available.

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- Definition

Percentage of quarterly repayment of term facility year five.

+ References

No definition available.

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- Definition

Percentage of quarterly repayment of term facility year four.

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No definition available.

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- Definition

Percentage of quarterly repayment of term facility year one.

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No definition available.

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- Definition

Percentage of quarterly repayment of term facility year three.

+ References

No definition available.

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- Definition

Percentage of quarterly repayment of term facility year two.

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No definition available.

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- Definition

Ratio of Indebtedness to Consolidated EBITDA

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No definition available.

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- Definition

Total initial amount borrowed under secured long term debt facility.

+ References

No definition available.

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- Definition

Maximum contractual interest rate for funds borrowed, under the debt agreement.

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

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-Article 5

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-Subparagraph (SX 210.5-02.22(a)(1))

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- Definition

Minimum contractual interest rate for funds borrowed, under the debt agreement.

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- Definition

Nominal or face amount used to calculate payments on the derivative asset.

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

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- Definition

Fixed interest rate related to the interest rate derivative.

+ References

No definition available.

+ Details

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- Definition

The fee, expressed as a percentage of the line of credit facility, for the line of credit facility regardless of whether the facility has been used.

+ References

No definition available.

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- Definition

Amount of current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any amounts currently outstanding under the facility.

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- 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.

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- Definition

Including the current and noncurrent portions, aggregate carrying value as of the balance sheet date of loans payable (with maturities initially due after one year or beyond the operating cycle if longer).

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- Definition

Disclosure of timing of required repayments, sinking fund requirements, and other redeemable securities at fixed or determinable prices and dates in the five years immediately following the date of the latest balance sheet presented in the financial statements, and the amount thereafter to fully repay the principal of long-term debt. These disclosures may be made either on an individual debt or security basis, by type of debt or security basis, or on a combined basis.

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Carrying value as of the balance sheet date of loans payable (with maturities initially due after one year or beyond the operating cycle if longer), excluding current portion.

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- Definition

Amount of cash inflow from contractual arrangement with the lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements.

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Long-Term Debt (Details Textual) (USD $)	12 Months Ended	0 Months Ended
Long-Term Debt (Details Textual) (USD $)	May 31, 2014	Sep. 19, 2013	May 31, 2013
Debt Instrument [Line Items]
Senior secured term loan facility		$ 100,000,000
Senior secured revolving credit facility		100,000,000
Bank credit agreement maturity period	P5Y
Quarterly percentage repayment of term facility year one	5.00%
Quarterly percentage repayment of term facility year two	5.00%
Quarterly percentage repayment of term facility year three	10.00%
Quarterly percentage repayment of term facility year four	15.00%
Quarterly percentage repayment of term facility year five	65.00%
Percentage of increase in interest	2.00%
Notional amount of interest rate swap agreement	100,000,000us-gaap_DerivativeAssetNotionalAmount
Fixed interest rate payments	0.74%us-gaap_DerivativeFixedInterestRate
Loans payable, noncurrent	91,250,000us-gaap_LongTermLoansPayable		135,000,000us-gaap_LongTermLoansPayable
Ratio for debt service coverage	1.35ango_DebtServiceCoverageRatio
Ratio of indebtedness to consolidated EBITDA	3.75
Line of Credit [Member]
Debt Instrument [Line Items]
Percentage of increases leverage ratio base rate, minimum	1.50%
Percentage of increases leverage ratio base rate, maximum	2.25%
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Loans payable, noncurrent			46,410,000
Term Loan [Member]
Debt Instrument [Line Items]
Percentage of increases leverage ratio base rate, minimum	0.50%
Percentage of increases leverage ratio base rate, maximum	1.25%
Loans Payable	96,250,000
Maximum [Member]
Debt Instrument [Line Items]
Commitment fee percentage	0.35%
Minimum [Member]
Debt Instrument [Line Items]
Commitment fee percentage	0.20%
Letter of Credit [Member]
Debt Instrument [Line Items]
Credit facility borrowing capacity		20,000,000
Swingline Loans [Member]
Debt Instrument [Line Items]
Credit facility borrowing capacity		5,000,000
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Borrowing under Revolving Facility		$ 41,400,000