Commitments and Contingencies - Additional Information (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Jan. 01, 2019	Dec. 31, 2018
Loss Contingencies [Line Items]
Lease interest rate			6.40%
Capital lease commitment outstanding	$ 100,000		$ 100,000			$ 100,000
Remaining operating lease term			1 year 10 months 24 days
Rent expense	300,000	$ 300,000	$ 1,000,000	$ 900,000
Cash payments related to operating lease	400,000		1,000,000
Liability in connection with lawsuit	0		0
Alphatec Spine, Inc.
Loss Contingencies [Line Items]
Guaranteed obligated minimum royalty payments through 2023 and beyond	$ 5,000,000		$ 5,000,000
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]
Operating lease discount rate					10.50%