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DESCRIPTION OF BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details 1) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Valuation and Qualifying Accounts Disclosure [Line Items]      
Beginning balance $ 8,708    
Ending balance 13,586 $ 8,708  
Chargebacks [Member]      
Valuation and Qualifying Accounts Disclosure [Line Items]      
Beginning balance 6,865 4,076 $ 5,662
Accruals/Adjustments 51,933 35,740 28,009
Credits Taken Against Reserve (47,417) (32,951) (29,595)
Ending balance 11,381 6,865 4,076
Medicaid Rebates [Member]      
Valuation and Qualifying Accounts Disclosure [Line Items]      
Beginning balance 2,264 253 180
Accruals/Adjustments 6,719 2,692 333
Credits Taken Against Reserve (4,352) (681) (260)
Ending balance 4,631 2,264 253
Allowance for Sales Returns [Member]      
Valuation and Qualifying Accounts Disclosure [Line Items]      
Beginning balance 1,445 736 411
Accruals/Adjustments 2,808 1,493 1,595
Credits Taken Against Reserve (1,605) (784) (1,270)
Ending balance 2,648 1,445 736
Administrative Fees And Other Rebates [Member]      
Valuation and Qualifying Accounts Disclosure [Line Items]      
Beginning balance 1,487 735 231
Accruals/Adjustments 6,136 5,212 2,355
Credits Taken Against Reserve (5,970) (4,460) (1,851)
Ending balance 1,653 1,487 735
Prompt Payment Discounts [Member]      
Valuation and Qualifying Accounts Disclosure [Line Items]      
Beginning balance 471 332 242
Accruals/Adjustments 2,744 1,820 1,129
Credits Taken Against Reserve (2,541) (1,681) (1,039)
Ending balance $ 674 $ 471 $ 332