Acquisitions (Details) (Water Star, Inc., USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2013	May 31, 2011
Water Star, Inc.
Business Acquisition
Date of acquisition	May 31, 2011
Purchase price		$ 4,456
Cash paid as part of purchase price	2,956
Number of payments to be made in future in acquisition	2
Amount of each installment payments	750
Purchase price allocation
Current Assets		426
Property, Plant and Equipment, Net		167
Identified Intangible Assets		3,800
Goodwill		472
Total Assets Acquired		4,865
Current Liabilities		409
Total Liabilities Assumed		409
Net Assets Acquired		$ 4,456