Commitments and Contingencies - Additional Information (Details)		3 Months Ended		9 Months Ended
	Dec. 04, 2019 ft²	Sep. 30, 2020 USD ($)	Sep. 30, 2019 USD ($)	Sep. 30, 2020 USD ($)	Sep. 30, 2019 USD ($)	Jan. 01, 2019
Loss Contingencies [Line Items]
Remaining operating lease term				1 year 2 months 12 days
Rent expense		$ 300,000	$ 300,000	$ 1,000,000.0	$ 1,000,000.0
Payments related to operating lease		400,000	$ 400,000	1,100,000	$ 1,000,000.0
Liability in connection with lawsuit		0		0
Alphatec Spine, Inc.
Loss Contingencies [Line Items]
Guaranteed obligated minimum royalty payments through 2024 and beyond		4,500,000		4,500,000
Third-party Provider
Loss Contingencies [Line Items]
Minimum purchase commitment requirements		$ 3,500,000		$ 3,500,000
Minimum purchase commitment to be paid period				3 years
Recognized an ROU asset related to purchase agreement amount				$ 500,000
Minimum
Loss Contingencies [Line Items]
Operating lease term		1 year		1 year
Maximum
Loss Contingencies [Line Items]
Operating lease term		5 years 6 months		5 years 6 months
Building lease
Loss Contingencies [Line Items]
Area for facility of office, engineering and research and development space | ft²	121,541
Lease agreement commencement term				first quarter of 2021
Lease agreement expiry date	Nov. 30, 2030
Operating lease discount rate						10.50%