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Bank borrowings
12 Months Ended
Dec. 31, 2012
Debt Disclosure [Abstract]  
Bank borrowings
7. Bank borrowings

Borrowings under the line of credit consist of borrowings in Euros used to fund international operations. The borrowings under such facility were less than $0.1 million and $1.3 million at December 31, 2012 and 2011, respectively. The weighted average interest rate on borrowings under lines of credit as of December 31, 2012 and 2011 was 3.7% and 4.0%, respectively.

The Company had an unused available line of credit of €5.8 million ($7.6 million) and €6.3 million ($8.1 million) at December 31, 2012 and 2011, respectively, in its Italian line of credit. This line of credit provides the Company the option to borrow amounts in Italy at rates which are determined at the time of borrowing. This line of credit is unsecured.