SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - consolidated revenue (Details) - Revenue from Contract with Customer Benchmark	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Product Concentration Risk | VASOSTRICT®
Product Information [Line Items]
Concentration risk, percentage	30.00%	27.00%	18.00%
Product Concentration Risk | XIAFLEX®
Product Information [Line Items]
Concentration risk, percentage	14.00%	11.00%	11.00%
AmerisourceBergen Corporation | Customer Concentration Risk
Product Information [Line Items]
Concentration risk, percentage	36.00%	33.00%	34.00%
McKesson Corporation | Customer Concentration Risk
Product Information [Line Items]
Concentration risk, percentage	32.00%	27.00%	26.00%
Cardinal Health, Inc. | Customer Concentration Risk
Product Information [Line Items]
Concentration risk, percentage	22.00%	24.00%	25.00%