Other Income, net of expenses (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Other Income, net of expenses [Abstract]
Interest Income, Other	$ 239	$ 288	$ 578	$ 535
Gain (Loss) on Investments	(212)	(23)	(164)	51
License Fee Income	76	67	290	493
Other Income	(71)	289	80	390
Other income, net of expenses	$ 32	$ 621	$ 784	$ 1,469