Cash velocity percentage.

No definition available.

Name:	ngnm_CashVelocityPercentage
Namespace Prefix:	ngnm_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Cash velocity percentage one.

+ References

No definition available.

+ Details

Name:	ngnm_CashVelocityPercentageOne
Namespace Prefix:	ngnm_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Cash velocity percentage other.

+ References

No definition available.

+ Details

Name:	ngnm_CashVelocityPercentageOther
Namespace Prefix:	ngnm_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Increased facility cap.

+ References

No definition available.

+ Details

Name:	ngnm_IncreasedFacilityCap
Namespace Prefix:	ngnm_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Line of credit facility commitment fee percentage if revolver terminated one year before amendment date.

+ References

No definition available.

+ Details

Name:	ngnm_LineOfCreditFacilityCommitmentFeePercentageIfRevolverTerminatedOneYearBeforeAmendmentDate
Namespace Prefix:	ngnm_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Line of credit facility commitment fee percentage if revolver terminated two years after amendment date.

+ References

No definition available.

+ Details

Name:	ngnm_LineOfCreditFacilityCommitmentFeePercentageIfRevolverTerminatedTwoYearsAfterAmendmentDate
Namespace Prefix:	ngnm_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Line of credit facility commitment fee percentage if revolver terminated two years before amendment date.

+ References

No definition available.

+ Details

Name:	ngnm_LineOfCreditFacilityCommitmentFeePercentageIfRevolverTerminatedTwoYearsBeforeAmendmentDate
Namespace Prefix:	ngnm_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Minimum termination fee grace period.

+ References

No definition available.

+ Details

Name:	ngnm_MinimumTerminationFeeGracePeriod
Namespace Prefix:	ngnm_
Data Type:	xbrli:durationItemType
Balance Type:	na
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

The reference rate for the variable rate of the debt instrument, such as LIBOR or the US Treasury rate and the maturity of the reference rate used, such as three months or six months LIBOR.

+ References

No definition available.

+ Details

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

- Definition

Amount borrowed under the credit facility as of the balance sheet date.

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19, 22

-Article 5

+ Details

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

- Definition

Amount of the fee for available but unused credit capacity under the credit 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

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19, 22

-Article 5

+ Details

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

- 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.

+ References

+ Details

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

- Definition

Date the credit facility terminates, in CCYY-MM-DD format.

+ References

+ Details

Name:	us-gaap_LineOfCreditFacilityExpirationDate1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

The effective interest rate during the reporting period.

+ References

+ Details

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

- Details

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

- Definition

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

+ References

+ Details

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

- 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.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 235

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.4-08.(f))

-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 08

-Paragraph f

-Article 4

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Financing Activities

-URI http://asc.fasb.org/extlink&oid=6513228

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 14

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3255-108585

+ Details

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

Revolving Credit and Security Agreement - Additional Information (Detail) (USD $)	0 Months Ended		3 Months Ended		0 Months Ended	3 Months Ended		0 Months Ended		3 Months Ended	0 Months Ended
	Jan. 31, 2013	Mar. 26, 2012	Mar. 31, 2014	Mar. 31, 2013	Mar. 26, 2012 Maximum [Member]	Mar. 31, 2013 Maximum [Member]	Jan. 25, 2013 Maximum [Member]	Jan. 25, 2013 Minimum [Member]	Mar. 26, 2012 Minimum [Member]	Mar. 31, 2013 Minimum [Member]	Mar. 26, 2012 Amended and Restated Credit Arrangement [Member]	Jan. 24, 2014 Third Amended and Restated Credit Agreement [Member] Revolving Credit Facility [Member]	Jan. 24, 2014 Third Amended and Restated Credit Agreement [Member] Revolving Credit Facility [Member] Effective from December 1, 2013 to March 31, 2014 [Member]	Jan. 24, 2014 Third Amended and Restated Credit Agreement [Member] Revolving Credit Facility [Member] Effective from December 31, 2012 to March 31, 2013 [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Current Borrowing Capacity					$ 8,000,000				$ 5,000,000
Increase in line of credit facility cap	12,000,000				10,000,000			1,000,000	1,000,000
Amended and Restated Credit Agreement maturity date		Mar. 26, 2015
Minimum termination fee, percentage at any time before March 26, 2013		2.50%
Minimum termination fee, percentage after March 26, 2013 but before March 26, 2014		1.50%
Minimum termination fee, percentage on or after March 26, 2014		0.50%
Minimum termination fee, grace period		5 days
Debt Instrument, Basis Spread on Variable Rate		2.00%									1.00%
Debt Instrument, Description of Variable Rate Basis			"The LIBOR shall be not less than 2.0%" and replacing it with "the LIBOR shall be not less than 1.0%"
Commitment fee for capital source		80,000	5,000	10,000
Increased facility cap							10,000,000	9,000,000
Cash Velocity Percentage						87.50%				80.00%			80.00%
Cash Velocity Percentage														75.00%
Cash velocity percentage other												87.50%
Effective rate of interest			4.25%
Increase in line of credit facility cap, remaining			4,200,000
Outstanding borrowing			$ 4,900,000