Summary of Significant Accounting Policies - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Significant Accounting Policies [Line Items]
Percentage of consolidated revenues held by customer	10.00%
Total deferred revenue	$ 1,400,000	$ 2,800,000
Inventory at consigned location	22,000,000	15,000,000
Percentage of weighted average cost of capital discount rate	14.00%
Percentage of excess fair value over carrying value	6.00%
Percentage of increase discount rate	1.50%
In-process research and development expense	341,000		1,000,000
Foreign currency gains	(900,000)	500,000	1,100,000
Contingent consideration	3,700,000
Product shipment costs	2,900,000	3,600,000	2,600,000
Stock-based compensation expense	1,300,000	0	200,000
Transaction related expenses [Member]
Significant Accounting Policies [Line Items]
Stock-based compensation expense	$ 200,000
Minimum [Member]
Significant Accounting Policies [Line Items]
Estimated useful lives of property and equipment	4 years
Percentage of decrease growth rate or gross margin	2.00%
Intangible assets, amortization period	1 year
Maximum [Member]
Significant Accounting Policies [Line Items]
Estimated useful lives of property and equipment	7 years
Percentage of decrease growth rate or gross margin	3.00%
Intangible assets, amortization period	15 years