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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)
 12 Months Ended
Dec. 31, 2018
Accounting Policies [Abstract]  
Schedule of percentage of revenue comprised by the three largest customers
The table below includes the percentage of net product sales comprised by the Company’s three largest wholesalers in each period presented:
 
Year Ended December 31,
 
2018
 
2017
 
2016
Largest wholesaler
34
%
 
35
%
 
32
%
Second largest wholesaler
30
%
 
30
%
 
28
%
Third largest wholesaler
26
%
 
26
%
 
26
%
   Total
90
%
 
91
%
 
86
%
Schedule of useful lives by asset category
Useful lives by asset category are as follows:
Asset Category
 
Useful Life
Computer equipment and software
 
1 to 3 years
Office furniture and equipment
 
5 years
Manufacturing and laboratory equipment
 
5 to 10 years