REVENUE RECOGNITION AND RELATED ALLOWANCES - Disaggregation (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Revenue recognition	$ 52,061	$ 52,979	$ 155,207	$ 151,223
Sales of generic pharmaceutical products [Member]
Revenue recognition	35,140	37,712	101,952	108,607
Sales of branded pharmaceutical products [Member]
Revenue recognition	14,313	12,411	32,868	32,201
Sales of contract manufactured products [Member]
Revenue recognition	2,382	2,152	7,277	7,026
Royalties from licensing agreements [Member]
Revenue recognition		339	11,210	1,120
Product development services [Member]
Revenue recognition	77	289	332	1,751
Other [Member]
Revenue recognition	$ 149	$ 76	$ 1,568	$ 518

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
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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+ Details