v3.21.2

BUSINESS COMBINATION - ApiFix (Details)	Apr. 01, 2020 USD ($) facility $ / shares shares	Sep. 30, 2021 $ / shares	Dec. 31, 2020 $ / shares
Business Acquisition
Common stock, par value (in dollars per share) | $ / shares		$ 0.00025	$ 0.00025
ApiFix Ltd
Business Acquisition
Cash consideration	$ 2,000,000
Cash acquired	$ 344,000
Purchase of shares and membership interests in common stock (in shares) | shares	934,783
Common stock, par value (in dollars per share) | $ / shares	$ 0.00025
Issuance of common stock	$ 35,176,000
Common stock (in dollars per share) | $ / shares	$ 37.63
Anniversary Payments	$ 30,000,000
System sales payment	41,741,000
Fair value of estimated total acquisition consideration	$ 87,379,000
Number of clinical procedures | facility	150
Revenue multiplier	2.25
ApiFix Ltd | Second Anniversary
Business Acquisition
Subsequent payments	$ 13,000,000
ApiFix Ltd | Third Anniversary
Business Acquisition
Subsequent payments	8,000,000
ApiFix Ltd | Fourth Anniversary
Business Acquisition
Subsequent payments	$ 9,000,000

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