Business Combination (Details) (USD $)	12 Months Ended
	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012
Business Combinations [Abstract]
Goodwill	$ 28,866,000	[1],[2]	$ 29,103,000	[1],[2]
Amortization expense	$ 600,000		$ 300,000		$ 700,000

[1] Regulatory approval for Intuitrak in Japan acquired through an amendment with a distributor in the fourth quarter of 2014.

[2] Difference in goodwill value between these dates is solely due to a foreign currency translation adjustment.