COMMITMENTS AND CONTINGENCIES (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
COMMITMENTS AND CONTINGENCIES
Revenue recognition	$ 48,625	$ 48,470	$ 103,146	$ 98,244
Unapproved Products [Member]
COMMITMENTS AND CONTINGENCIES
Revenue recognition	4,200	3,700	8,000	8,100
Unapproved Products [Member] \| Contract Customer [Member]
COMMITMENTS AND CONTINGENCIES
Revenue recognition	$ 600	$ 600	$ 1,400	$ 1,600

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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-Section 50
-Paragraph 30
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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+ Details