Commitments and Contingent Liabilites (Tables)

6 Months Ended

Jun. 30, 2014

Commitments and Contingent Liabilities [Abstract]

Schedule of Product Warranty Liability [Table Text Block]

		Warranty Liability
Balance at December 31, 2013	$	7,483
Additions to warranty liability		5,286
Warranty liability utilized		(3,175)
Balance at June 30, 2014	$	9,594