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Severance Charge (Narrative) (Details) (USD $) In Thousands, unless otherwise specified	2 Months Ended	3 Months Ended	9 Months Ended
	Aug. 31, 2013 employee	Sep. 30, 2013	Sep. 30, 2013 Cost Of Sales [Member]	Sep. 30, 2013 Sales And Marketing [Member]	Sep. 30, 2013 Research And Development Expenses [Member]	Sep. 30, 2013 General And Administrative Expenses [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges		$ 192	$ 13	$ 72	$ 8	$ 99
Expected reduction in operating costs	$ 1,300
Number of positions remaining	48

Amount of expenses for special or contractual termination benefits provided to current employees involuntarily terminated under a benefit arrangement associated exit or disposal activities pursuant to an authorized plan. Excludes expenses related to one-time termination benefits, a discontinued operation or an asset retirement obligation.

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