Acquisition (Details) (USD $)	9 Months Ended				0 Months Ended
	Jun. 30, 2013	Sep. 30, 2012	Jun. 30, 2012	Sep. 30, 2011	Oct. 31, 2012 Etherios [Member]	Oct. 31, 2012 Maximum [Member]	Oct. 31, 2012 Common Stock [Member] Etherios [Member]
Business Acquisition [Line Items]
Total purchase price					$ 20,500,000
Cash, including cash in escrow					13,696,000
Cash acquired					800,000
Common stock					6,804,000
Number of shares							715,571
Common stock issued per common share					9.508
Amount in escrow					2,350,000
Escrow holdback					300,000
Escrow cash					2,050,000
Escrow cash period						18 months
Acquisition Related Costs	200,000
Goodwill	$ 102,611,000	$ 86,209,000	$ 85,544,000	$ 86,012,000	$ 17,120,000