Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 45

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5

Reference 3: 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

Name:	us-gaap_DebtInstrumentInterestRateEffectivePercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

Financial instruments: (Details 4) (Long-term payable) In Thousands, unless otherwise specified	Dec. 31, 2012 USD ($)	Dec. 31, 2012 OMVL EUR (€)	Jul. 02, 2010 OMVL USD ($)	Jul. 02, 2010 OMVL EUR (€)
Long-term debt
Portion of the purchase price payable on the third anniversary		€ 7,600	$ 10,021	€ 7,600
Effective interest rate (as a percent)		3.65%
Excess of fair value over carrying value	$ 70
Market interest rate (as a percent)	2.35%