Commitments and Contingencies - Additional Information (Details)			3 Months Ended		6 Months Ended
	Apr. 09, 2021 USD ($) ft²	Dec. 04, 2019 USD ($) ft²	Jun. 30, 2021 USD ($)	Jun. 30, 2020 USD ($)	Jun. 30, 2021 USD ($)	Jun. 30, 2020 USD ($)	Dec. 31, 2020 USD ($)
Loss Contingencies [Line Items]
Lessee operating lease, description					The Company recognizes right-of-use assets (“ROU assets”) and lease liabilities for office buildings and certain equipment with lease terms of 1 year to 10 years, some of which include options to extend and/or terminate the leases. Any short-term leases defined as twelve months or less or month-to-month leases were excluded and continue to be expensed each month. Total costs associated with these short-term leases is immaterial to all periods presented.
Right-of-use asset			$ 26,604,000		$ 26,604,000		$ 1,177,000
Lease Liability			28,190,000		28,190,000
Liability in connection with lawsuit			0		0
Alphatec Spine, Inc.
Loss Contingencies [Line Items]
Guaranteed obligated minimum royalty payments through 2026 and beyond			3,400,000		3,400,000
Third-party Provider
Loss Contingencies [Line Items]
Minimum purchase commitment requirements			1,800,000		$ 1,800,000
Minimum purchase commitment to be paid period					3 years
Recognized an ROU asset related to agreement amount					$ 500,000
Rent expense pertaining to assets			100,000	$ 0	200,000	$ 0
Leased assets within agreement			$ 400,000		$ 400,000
EOS Imaging S.A. | Inventory Purchase | Third-party Supplier
Loss Contingencies [Line Items]
Minimum purchase commitment requirements period month and year					2025-12
Remaining minimum purchase commitment required					$ 28,800,000
Building lease
Loss Contingencies [Line Items]
Operating lease term	7 years	10 years
Area for facility of office, engineering and research and development space | ft²	75,643	121,541
Lease agreement commencement date	May 01, 2021	Feb. 01, 2021
Lease agreement expiry date	May 01, 2028	Jan. 31, 2031
Lease renewal term	236 months	260 months
Right-of-use asset	$ 1,700,000	$ 21,100,000
Lease Liability		$ 21,500,000
Beginning and end of abatement period		full abatement during months two through ten
Annual increase in base rent	3.00%	3.00%
Expected date of proportionate share of building upon commencement lease	May 01, 2021
Expected percentage to occupy lease premises	100.00%
Building lease | First year
Loss Contingencies [Line Items]
Lease base rent payment per month		$ 200,000
Minimum [Member]
Loss Contingencies [Line Items]
Operating lease term			1 year		1 year
Minimum [Member] | Building lease | First year
Loss Contingencies [Line Items]
Abatement period		2 months
Maximum
Loss Contingencies [Line Items]
Operating lease term			10 years		10 years
Maximum | Building lease | First year
Loss Contingencies [Line Items]
Abatement period		10 months