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1. Company Overview (Tables)
6 Months Ended
Jun. 30, 2015
Accounting Policies [Abstract]  
Significant Customers

Gross Product Sales:

      Three Months Ended     Six Months Ended
      June 30,     June 30,
      2015     2014     2015     2014
                         
McKesson Corporation     37%     40%     41%     38%
AmerisourceBergen Drug Corporation     29%     25%     24%     30%
Cardinal Health, Inc.     27%     21%     28%     19%
     Total     93%     86%     93%     87%

Accounts Receivable:

      June 30,     December 31,
      2015     2014
McKesson Corporation     41%     29%
AmerisourceBergen Drug Corporation     24%     42%
Cardinal Health, Inc.     28%     18%
Total     93%     89%