Goodwill and Intangible Assets (Details 1) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Intangible assets
Gross carrying amount	$ 7,659	$ 7,635
Accumulated amortization	(6,265)	(5,819)
Net carrying amount	1,394	1,816
Acquired technology [Member]
Intangible assets
Gross carrying amount	5,318	5,299
Accumulated amortization	(4,273)	(3,891)
Net carrying amount	1,045	1,408
Customer relationships [Member]
Intangible assets
Gross carrying amount	2,191	2,186
Accumulated amortization	(1,971)	(1,922)
Net carrying amount	220	264
Non-competition agreements [Member]
Intangible assets
Gross carrying amount	150	150
Accumulated amortization	(21)	(6)
Net carrying amount	$ 129	$ 144