Acquisition (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Sep. 11, 2011
Allocation of the acquisition consideration to the assets acquired and liabilities assumed
Acquisition consideration	$ 7,038	$ 7,100
Net assets acquired:
Cash and cash equivalents	1,481
Other current assets	1,124
Property, equipment, and furniture	103
Current liabilities	(473)
Long-term tax liabilities	(210)
Net assets acquired	3,300
Goodwill	3,738
Customer relationships [Member]
Net assets acquired:
Intangible assets	973
Non-compete agreements [Member]
Net assets acquired:
Intangible assets	206
Trade names and trademarks [Member]
Net assets acquired:
Intangible assets	$ 96