EQUITY AND STOCK-BASED COMPENSATION Restricted Stock Awards and Restricted Stock Units Narrative (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Restricted Stock Units (RSUs) [Member] \| Executive Officer
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock Issued During Period, Shares, Restricted Stock Award, Gross	0	0	0	0
Restricted Stock Units (RSUs) [Member] \| Employee
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock Issued During Period, Shares, Restricted Stock Award, Gross	82,743	10,600	804,150	409,385
Restricted Stock [Member] \| Executive Officer
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock Issued During Period, Shares, Restricted Stock Award, Gross	0	0	141,575	65,540
Restricted Stock [Member] \| Employee
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock Issued During Period, Shares, Restricted Stock Award, Gross	0	0	0	0
Restricted Stock Awards and Performance Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount	$ 7.9		$ 7.9
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition			1 year 2 months 12 days

SeaSpine Holdings Corp 10-Q