REVENUES - Company's disaggregation of revenues (Details) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Revenues		$ 6,427	$ 10,967	$ 17,747	$ 32,613
Chiesi Ex US Agreement [Member]
Revenues		500	500	900	1,200
Variable Consideration				10,000
Proceeds From Variable Consideration	$ 10,000
Goods [Member]
Revenues		3,243	3,648	7,754	8,679
Goods [Member] | Pfizer [Member]
Revenues		2,237	663	6,748	2,679
Goods [Member] | Brazil [Member]
Revenues		988	2,985	988	6,000
Goods [Member] | Chiesi [Member]
Revenues		18		18
License and R&D Services [Member]
Revenues		$ 3,184	$ 7,319	$ 9,993	23,934
License and R&D Services [Member] | Chiesi US Agreement and Chiesi Ex US Agreement [Member] | Change in Accounting Method Accounted for as Change in Estimate [Member]
Reduction To Accumulated Revenue Recognized					$ 4,100