Other Income, Net of Expenses (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Other Income, Net of Expenses [Abstract]
Interest income	$ 155	$ 127	$ 443	$ 264
Income from life insurance policies	0	0	0	1,204
Gain (loss) on investments	22	(109)	(15)	(132)
License fee income	61	103	256	366
Other	38	152	135	331
Total	$ 276	$ 273	$ 819	$ 2,033