Goodwill and Other Intangible Assets (Detail 1) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Amortized intangible assets
Amortized intangible assets, gross carrying amount	$ 11,757	$ 12,523
Amortized intangible assets, accumulated amortization	(4,434)	(4,682)
Licensing Agreements [Member]
Amortized intangible assets
Amortized intangible assets, gross carrying amount	767	818
Amortized intangible assets, accumulated amortization	(767)	(818)
Technology [Member]
Amortized intangible assets
Amortized intangible assets, gross carrying amount	2,500	2,500
Amortized intangible assets, accumulated amortization	(185)	(143)
Customer Relationships [Member]
Amortized intangible assets
Amortized intangible assets, gross carrying amount	2,439	2,477
Amortized intangible assets, accumulated amortization	(248)	(195)
Patents [Member]
Amortized intangible assets
Amortized intangible assets, gross carrying amount	5,430	6,037
Amortized intangible assets, accumulated amortization	(3,025)	(3,274)
Other [Member]
Amortized intangible assets
Amortized intangible assets, gross carrying amount	621	691
Amortized intangible assets, accumulated amortization	$ (209)	$ (252)