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Escrow and security interest term.

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Percentage of securities consideration.

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Unrestricted Securities Consideration, Percentage

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Number of shares of equity interests issued or issuable to acquire entity.

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Amount of equity interests of the acquirer, including instruments or interests issued or issuable in consideration for the business combination.

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Amount of liabilities incurred by the acquirer as part of consideration transferred in a business combination.

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Amount of consideration received or receivable for the disposal of assets and liabilities, including discontinued operation.

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Acquisitions - Additional Information (Detail) € in Millions									12 Months Ended
	Sep. 30, 2019 shares	Oct. 31, 2018 USD ($) shares	Oct. 31, 2018 USD ($)	Dec. 30, 2016 shares	Dec. 30, 2016 EUR (€)	Sep. 21, 2015 USD ($) shares	Sep. 21, 2015 EUR (€) shares	Sep. 21, 2015 EUR (€)	Dec. 31, 2019 USD ($)	Dec. 31, 2019 EUR (€)	Dec. 31, 2018 USD ($)	Dec. 31, 2019 EUR (€)	Oct. 15, 2019 USD ($)
Business Acquisition [Line Items]
Additional consideration									$ 1,084,000		$ 10,637,000
Revenue									8,531,000		24,102,000
Net loss									$ (154,201,000)		(61,777,000)
Escrow and security interest period								24 months
Medical Surgery Technologies Ltd.
Business Acquisition [Line Items]
Cash consideration			$ 5,800,000
Stock consideration			$ 8,300,000
Unrestricted securities consideration									75.00%	75.00%
Revenue									$ 0
Net loss									400,000
Medical Surgery Technologies Ltd. \| Ending on Twelve Month Anniversary \| Maximum
Business Acquisition [Line Items]
Percentage of securities consideration			25.00%
Medical Surgery Technologies Ltd. \| First Tranche
Business Acquisition [Line Items]
Cash consideration			$ 5,800,000
Common shares issued \| shares		242,310
Medical Surgery Technologies Ltd. \| Second Tranche
Business Acquisition [Line Items]
Common shares issued \| shares	370,423
Additional consideration			$ 6,600,000
Stock consideration		$ 6,600,000
Senhance Surgical Robotic System Acquisition
Business Acquisition [Line Items]
Common shares issued \| shares						1,195,647	1,195,647
Additional consideration									10,600,000
Senhance Surgical Robotic System Acquisition \| U.S. Dollars
Business Acquisition [Line Items]
Cash consideration						$ 25,000,000.0
Senhance Surgical Robotic System Acquisition \| Euro
Business Acquisition [Line Items]
Cash consideration \| €							€ 27.5
Senhance Surgical Robotic System Acquisition \| Second Tranche
Business Acquisition [Line Items]
Cash consideration \| €										€ 15.1
Common shares issued \| shares				286,360
Additional consideration \| €					€ 5.0
Aggregate fair market value \| €							5.0
Senhance Surgical Robotic System Acquisition \| Second Tranche \| U.S. Dollars
Business Acquisition [Line Items]
Cash consideration payable									25,000,000.0
Senhance Surgical Robotic System Acquisition \| Second Tranche \| Euro
Business Acquisition [Line Items]
Cash consideration payable \| €												€ 22.5
Senhance Surgical Robotic System Acquisition \| Third Tranche
Business Acquisition [Line Items]
Cash consideration payable \| €							15.0	€ 15.0
Senhance Surgical Robotic System Acquisition \| Third Tranche \| Minimum
Business Acquisition [Line Items]
Target revenue to be achieved \| €							25.0	25.0
Senhance Surgical Robotic System Acquisition \| Fourth Tranche
Business Acquisition [Line Items]
Cash consideration \| €										€ 2.4
Cash consideration payable \| €							€ 2.5	€ 2.5
AutoLap
Business Acquisition [Line Items]
Disposal group, including discontinued operation, consideration													$ 17,000,000.0
Proceeds from sale of productive assets									16,000,000
Consideration receivable													$ 1,000,000.0
AutoLap
Business Acquisition [Line Items]
Gain from sale of assets, net									$ (15,965,000)		$ 0