Goodwill and intangible assets (Tables)

9 Months Ended

Sep. 30, 2012

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Finite-Lived Intangible Assets [Table Text Block]

The estimated useful lives and carrying value of acquired intangible assets are as follows:

		September 30, 2012						December 31, 2011
	Weighted  Average Useful Life	Gross  Carrying  Amount		Accumulated Amortization		Net  Carrying  Amount		Gross  Carrying  Amount		Accumulated Amortization		Net  Carrying  Amount
	(years)
Trademarks	6.9	$	70	$	27	$	43	$	70	$	16	$	54
Non-Compete Agreements	2.0	70		49		21		70		13		57
Customer Relationships	8.6	2,350		1,010		1,340		2,350		690		1,660
Developed Technology	6.0	1,880		799		1,081		1,880		510		1,370
Intangible assets		$	4,370	$	1,885	$	2,485	$	4,370	$	1,229	$	3,141

Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]

Amortization of acquired intangible assets is reflected in cost of revenue and operating expenses. The estimated future amortization of existing acquired intangible assets as of September 30, 2012 was as follows (in thousands):

2012 (remaining three months)	$	216
2013	727
2014	567
2015	389
2016	258
2017	156
Thereafter	172
Future amortization expense	$	2,485