Income Taxes (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011	Dec. 31, 2011
Components of income tax expense (benefit)
U.S. state current income tax expense (benefit)	$ 125,000	$ 70,000	$ 303,000	$ (297,000)
Federal current income tax benefit		137,000		137,000
Foreign current income tax expense	251,000	1,412,000	340,000	1,938,000
Foreign deferred income tax expense (benefit)	(371,000)	(595,000)	195,000	(152,000)
Total	5,000	1,024,000	838,000	1,626,000
Deferred foreign income tax liabilities	$ 500,000		$ 500,000		$ 100,000