21.Commitments

Under the terms of its operating lease for office premises in Casper, Wyoming, the Company is committed to minimum annual lease payments as follows:

Rent expense under these agreements was $0.2 million, $0.2 million and $0.1 million for the years ended December 31, 2014, 2013 and 2012, respectively.

The Company has agreed to a Contingency and Development Agreement with Sweetwater County for the improvement of a county road servicing the Lost Creek facility. The Company’s portion of the cost will be approximately $200 thousand and will be due after the work is completed.

Off Take Sales Agreements

We currently have nine off take sales agreements with various North American utilities. Most recently, in February 2015, we executed a multi-year agreement for sales deliveries of 200,000 pounds of uranium concentrates annually. In March 2014, we entered into a uranium sales arrangement for production in 2014 and 2016. The agreements call for deliveries ranging between 150,000 to 250,000 pounds of uranium concentrate each year. Those agreements were amended to include additional deliveries in 2015. These agreements supplement earlier offtake arrangements which were completed beginning in 2011.