Acquisition (Details) (USD $)	9 Months Ended
	Sep. 30, 2012	May 07, 2012
Goodwill
Balance at the beginning of the period	$ 54,617,000
Acquisitions	12,729,000
Reclassifications, adjustments and other	495,000
Balance at the end of the period	67,841,000
Speech Cycle
Acquisition
Percentage of capital stock acquired		100.00%
Cash consideration for capital stock acquired		27,000,000
Cash consideration for purchase of shares and warrants		26,000,000
Cash consideration estimated surplus working capital		1,000,000
Excess of purchase price over net tangible assets and liabilities, recorded as goodwill which is not tax deductible		12,729,000
Speech Cycle | Maximum
Acquisition
Potential payments for contingent consideration		12,000,000
Amount that could be paid to existing employees of SpeechCycle	$ 9,100,000
Expected period of time to finalize the purchase price allocation	9 months