REVENUE RECOGNITION AND RELATED ALLOWANCES (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2016	Mar. 31, 2015
Valuation and Qualifying Accounts Disclosure
Beginning balance	$ 13,586
Ending balance	13,630
Chargebacks
Valuation and Qualifying Accounts Disclosure
Beginning balance	11,381	$ 6,865
Accruals/Adjustments	14,778	10,260
Credits Taken Against Reserve	(15,256)	(10,526)
Ending balance	10,903	6,599
Medicaid Rebates
Valuation and Qualifying Accounts Disclosure
Beginning balance	4,631	2,264
Accruals/Adjustments	2,607	953
Credits Taken Against Reserve	(3,814)	(1,140)
Ending balance	3,424	2,077
Returns
Valuation and Qualifying Accounts Disclosure
Beginning balance	2,648	1,445
Accruals/Adjustments	1,637	566
Credits Taken Against Reserve	(1,619)	(194)
Ending balance	2,666	1,817
Administrative Fees and Other Rebates
Valuation and Qualifying Accounts Disclosure
Beginning balance	1,653	1,487
Accruals/Adjustments	2,089	1,472
Credits Taken Against Reserve	(1,470)	(1,825)
Ending balance	2,272	1,134
Prompt Payment Discounts
Valuation and Qualifying Accounts Disclosure
Beginning balance	674	471
Accruals/Adjustments	813	609
Credits Taken Against Reserve	(835)	(602)
Ending balance	$ 652	$ 478

Total of the adjustments in a given period to allowances and reserves, the valuation and qualifying accounts that are either netted against the cost of an asset (in order to value it at its carrying value) or that reflect a liability.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24092-122690

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 09
-Article 12

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