Intangible Assets and Goodwill - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Finite-Lived Intangible Assets [Line Items]
Amortization of intangible assets	$ 12	$ 13	$ 44
Intangible assets	10,279
Proceeds from sale of intellectual property			300
Gain on sale of intellectual property			300
Cooper Trade Name [Member]
Finite-Lived Intangible Assets [Line Items]
Amortization of intangible assets			32
Amortization period	4 years
Non-Compete Agreement [Member]
Finite-Lived Intangible Assets [Line Items]
Amortization of intangible assets	12	13	12
Amortization period	8 years
Developed Technology Rights [Member]
Finite-Lived Intangible Assets [Line Items]
Proceeds from sale of intellectual property			300
Gain on sale of intellectual property			300
Estech [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets	10,279
Number of intangible assets acquired	3,000
Estech [Member] | Fusion Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets	9,242
Intangible assets amortization period	10 years
Estech [Member] | Clamp and Probe Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets	829
Intangible assets amortization period	3 years
Estech [Member] | Estech Trade Name [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets	$ 208
Intangible assets amortization period	1 year