Income Taxes - Additional Information (Detail) - USD ($)	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018	Dec. 31, 2017
Income Tax Contingency [Line Items]
Estimates annual effective tax rate			4.30%
Deferred tax benefit			$ 1,479,000	$ 1,799,000
Current tax expense	$ (869,000)	$ (883,000)	$ (1,479,000)	$ (1,773,000)
Effective tax rate			3.40%	4.80%
Unrecognized tax benefits that would affect effective tax rate	0		$ 0
GILTI deferred amounts						$ 0
GILTI income tax			0		$ 0
Foreign Tax Authority | TransEnterix Italia
Income Tax Contingency [Line Items]
Net deferred tax asset	0		0
Valuation allowance	$ 0		0
Foreign Tax Authority | Israel Tax Authority
Income Tax Contingency [Line Items]
Current tax expense			$ 30,000.00