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9. Segment and Geographic Information (Tables)
6 Months Ended
Sep. 30, 2016
Segment Reporting [Abstract]  
Segment and Geographic Information
   Three Months   Six Months 
   Ended   Ended 
   September 30,   September 30, 
Geographic region  2016   2015   2016   2015 
United States  $1,697,000   $1,186,000   $3,070,000   $1,973,000 
Latin America   1,192,000    1,266,000    2,290,000    2,824,000 
Europe and Rest of World   920,000    952,000    1,958,000    1,523,000 
    3,809,000    3,404,000    7,318,000    6,320,000 
Product license fees and royalties   75,000    339,000    150,000    786,000 
Total product related revenues  $3,884,000   $3,743,000   $7,468,000   $7,106,000 
License fees and royalties by partner
   Three Months   Six Months 
   Ended   Ended 
   September 30,   September 30, 
Partner  2016   2015   2016   2015 
Exeltis  $   $103,000   $   $157,000 
Innovacyn       9,000        29,000 
Laboratorios Sanfer (affiliate of Invekra)   75,000    227,000    150,000    600,000 
Total product license fees and royalties  $75,000   $339,000   $150,000   $786,000