General and Summary of Significant Accounting Policies Goodwill (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Goodwill [Line Items]
GOODWILL	$ 5,577	$ 6,463
Goodwill, Acquired During Period	6,536	0	$ 0
Goodwill, Foreign Currency Translation Gain (Loss)	244
Goodwill, Purchase Accounting Adjustments		(886)
GOODWILL	12,357	$ 5,577	$ 6,463
Fannin [Member]
Goodwill [Line Items]
Goodwill, Acquired During Period	1,000
Medical Australia Limited [Member]
Goodwill [Line Items]
Goodwill, Acquired During Period	$ 5,500