The Company invested approximately $0 and $3.5 million in Enfission during the three months and nine months ended September 30, 2019, respectively. The total administrative consulting services was $0.3 million for the nine months ended September 30, 2019. This $0.3 million amount charged to Enfission was recorded as a $150,000 reduction of general and administrative expenses and a $150,000 reduction of research and development expenses.

The Company also provided research and development consulting services and management services to Enfission. The total consulting services income was $0.2 million for the three months ended September 30, 2019 and 2018, and $0.9 million and $0.8 million for the nine months ended September 30, 2019 and 2018, respectively, recorded under “Other income from joint venture” in the accompanying condensed consolidated statement of operations.

As of September 30, 2019, and December 31, 2018, the total receivable due from Enfission was approximately $0.6 million and $0.1 million, respectively, which represents consulting fees Lightbridge charged to Enfission and reimbursable expenses paid by Lightbridge on Enfission’s behalf.