REVENUE RECOGNITION AND RELATED ALLOWANCES - Disaggregation (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2021	Mar. 31, 2020
Revenue recognition	$ 54,521	$ 49,774
Sales of generic pharmaceutical products [Member]
Revenue recognition	32,988	37,495
Sales of branded pharmaceutical products [Member]
Revenue recognition	7,517	9,157
Sales of contract manufactured products [Member]
Revenue recognition	2,573	1,974
Royalties from licensing agreements [Member]
Revenue recognition	11,210	290
Product development services [Member]
Revenue recognition	158	577
Other [Member]
Revenue recognition	$ 75	$ 281

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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+ Details