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Note 4 - Inventory
12 Months Ended
Jun. 30, 2018
Notes to Financial Statements  
Inventory Disclosure [Text Block]
4.
Inventory
 
Inventory consisted of the following (in thousands):
 
   
June 30,
 
   
2018
   
2017
 
Raw materials
  $
371
    $
191
 
Work in process
   
96
     
121
 
Finished goods
   
27
     
11
 
Total inventory
  $
494
    $
323
 
 
   
June 30,
 
   
2018
   
2017
 
Enriched barium, non-current
  $
276
    $
470
 
Raw materials, non-current
   
43
     
43
 
Total inventory, non-current
  $
319
    $
513
 
 
Inventory, non-current represents raw materials that were ordered in quantities to obtain volume cost discounts which based on current and anticipated sales volumes will
not
be consumed within an operating cycle and enriched barium. On 
August 25, 2017, 
the Company entered into a Consignment Agreement and related Services Agreement with MedikorPharma-Ural LLC to begin utilizing our enriched barium-
130
 carbonate inventory. The Company anticipates obtaining enough Cesium-
131
 under this arrangement to obtain over 
4,000
 curies of Cesium-
131.
During the year ended
June 30, 2018 
the Company obtained
721
curies under this agreement which has been used in production. At
June 30, 2018,
the Company estimates that the remaining enriched barium will result in
2,629
curies;
660
of which will be obtained in the year ended
June 30, 2019
and
1,969
will be obtained after
June 30, 2019.
There is 
no
 assurance as to whether the agreement will be terminated before this full amount is obtained and other supply sources are used, nor is there assurance that the agreements with the 
third
-party Cesium-
131
 suppliers will be executed.