Intangible assets (Tables)

12 Months Ended

Dec. 31, 2011

Intangible assets [Abstract]

Identifiable finite-lived and indefinite-lived intangible assets

	2011						2010
	Gross carrying amount		Accumulated amortization		Intangible assets, net		Gross carrying amount		Accumulated amortization		Intangible assets, net
Finite-lived intangible assets:
Acquired product technology rights:
Developed product technology	$	2,872	$	(1,811)	$	1,061	$	2,872	$	(1,619)	$	1,253
Core technology		1,348		(850)		498		1,348		(760)		588
Trade name		190		(120)		70		190		(107)		83
Acquired R&D technology rights		350		(350)		—		350		(329)		21
Other acquired intangible assets		686		(406)		280		627		(342)		285
Total finite-lived intangible assets		5,446		(3,537)		1,909		5,387		(3,157)		2,230
Indefinite-lived intangible assets — IPR&D		675		—		675		—		—		—
Total identifiable intangible assets	$	6,121	$	(3,537)	$	2,584	$	5,387	$	(3,157)	$	2,230