REVENUE RECOGNITION AND RELATED ALLOWANCES - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Revenue Recognition	$ 52,979	$ 51,337	$ 151,223	$ 158,581
Sales of generic pharmaceutical products [Member]
Revenue Recognition	37,712	31,753	108,607	99,452
Sales of branded pharmaceutical products [Member]
Revenue Recognition	12,411	16,605	32,201	48,300
Sales of contract manufactured products [Member]
Revenue Recognition	2,152	2,376	7,026	8,499
Royalties from licensing agreements [Member]
Revenue Recognition	339	268	1,120	594
Product development services [Member]
Revenue Recognition	289	75	1,751	806
Other [Member]
Revenue Recognition	$ 76	$ 260	$ 518	$ 930

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
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+ Details