Goodwill, In-Process Research and Development and Intellectual Property - Additional Information (Detail) - USD ($) $ in Thousands		3 Months Ended
	Sep. 21, 2015	Jun. 30, 2016	Mar. 31, 2017	Dec. 31, 2016
Goodwill And Intangible Assets [Line Items]
Goodwill			$ 68,984	$ 68,697
Goodwill impairment		$ 61,800
In-process research and development			16,161	15,920
In-Process Research and Development [Member]
Goodwill And Intangible Assets [Line Items]
In-process research and development			16,161	$ 15,920
Discount rate	45.00%
Intellectual Property [Member]
Goodwill And Intangible Assets [Line Items]
Discount rate	45.00%
Safe Stitch Medical Inc [Member]
Goodwill And Intangible Assets [Line Items]
Goodwill			93,800
Senhance Surgical Robotic System Acquisition [Member]
Goodwill And Intangible Assets [Line Items]
Goodwill			$ 38,300
Intellectual property	$ 48,500
Senhance Surgical Robotic System Acquisition [Member] | In-Process Research and Development [Member]
Goodwill And Intangible Assets [Line Items]
In-process research and development	$ 17,100