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Property and equipment (Detail Textual) (USD $)	3 Months Ended		9 Months Ended
Property and equipment (Detail Textual) (USD $)	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Depreciation, Depletion and Amortization			$ 2,930,000	$ 2,881,000
Synodex [Member]
Impairment of Long-Lived Assets Held-for-use	5,500,000		5,500,000
Property, Plant and Equipment [Member]
Depreciation, Depletion and Amortization	$ 900,000	$ 800,000	$ 2,400,000	$ 2,300,000

- Definition

The aggregate amount of write-downs for impairments recognized during the period for long lived assets held for use (including those held for disposal by means other than sale).

+ References+ Details