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Note 7 - Commitments and Contingencies
 6 Months Ended
Dec. 31, 2019
Notes to Financial Statements  
Commitments and Contingencies Disclosure [Text Block]
7.
Commitments and Contingencies
 
Isotope Purchase Agreement
 
 
In
December 2015,
the Company completed negotiations with The Open Joint Stock Company (located in Russia) for the purchase of Cesium-
131
manufactured by the Institute of Nuclear Materials. The purchase agreement provided the Company with
one
year’s supply of Cesium-
131.
The original agreement was due to expire on
March 31, 2017,
but in
December 2016
an addendum was signed extending it until
December 31, 2017.
On
October 23, 2017,
the Company, together with The Open Joint Stock Company, signed an addendum to the contract to include Cesium-
131
manufactured at RIAR and extending it until
December 31, 2018.
On
December 24, 2018,
an addendum was signed extending the term of the supply contract through
December 31, 2019
and modifying the volume of additional shipments of Cesium-
131.
Under the addendum, current pricing and volumes for Cesium-
131
purchases remained in place until
May 31, 2019.
On
July 11, 2019,
another addendum was signed extending the pricing terms until
August 4, 2019.
On
July 30, 2019,
a new supply contract was signed with The Open Joint Stock Company for a term of
August 2019
to
December 2020
as the Company had purchased the maximum amount of Cesium-
131
permitted under the prior agreement.