XML 37 R38.htm IDEA: XBRL DOCUMENT
v2.4.0.8

Basis of Presentation and Summary of Significant Accounting Policies (Schedule of Gross and Net Intangible Assets) (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Jun. 30, 2013 | Jun. 30, 2012
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | $ 12,906 | $ 12,282
Accumulated Amortization | 8,663 | 7,176
Net Carrying Amount | 4,243 | 5,106
Patents |  |
Finite-Lived Intangible Assets [Line Items] |  |
Weighted Average Remaining Amortization Period | 6 years 8 months 12 days | 7 years 4 months 24 days
Gross Carrying Amount | 1,800 | 1,800
Accumulated Amortization | 846 | 669
Net Carrying Amount | 954 | 1,131
License Agreements |  |
Finite-Lived Intangible Assets [Line Items] |  |
Weighted Average Remaining Amortization Period | 10 years 3 months 18 days | 9 years 3 months 18 days
Gross Carrying Amount | 10,447 | 10,158
Accumulated Amortization | 7,407 | 6,231
Net Carrying Amount | 3,040 | 3,927
Other Intangibles |  |
Finite-Lived Intangible Assets [Line Items] |  |
Weighted Average Remaining Amortization Period | 2 years 3 months 18 days | 3 months 18 days
Gross Carrying Amount | 659 | 324
Accumulated Amortization | 410 | 276
Net Carrying Amount | $ 249 | $ 48

X
- Definition Finite-Lived Intangible Assets, Weighted Average Remaining Amortization Period + References No definition available. + Details
Name: | extr_FiniteLivedIntangibleAssetsWeightedAverageRemainingAmortizationPeriod
Namespace Prefix: | extr_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
Name: | us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
Name: | us-gaap_FiniteLivedIntangibleAssetsGross
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_FiniteLivedIntangibleAssetsLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
Name: | us-gaap_FiniteLivedIntangibleAssetsNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant