Related Party Transaction (Details) - SeaSpine - Joint development agreement - USD ($)	3 Months Ended
Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Related Party Transaction [Line Items]
Reimbursement charges expensed	$ 10,000	$ 22,000
Outstanding liability to SeaSpine	$ 0		$ 0
Term of product royalty sales period (in years)	10 years

Amount of payable due to an entity that is affiliated with the reporting entity by means of direct or indirect ownership. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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