The funding, which includes direct investment and grants, aims to help the asteroid mining company launch its first commercial prospecting mission by 2020.
Shares were up more than 5% after the firm posted higher output across all divisions, except for copper, and said market conditions for its diamond business had improved.
He envisions people living in big glass-carbon fiber domes on the surface, with additional areas mined out below the surface by robots for "industrial" uses.
The company remains confident the sale of its Rustenburg mines in South Africa to Sibanye Gold will clear its last regulatory hurdle before the end of the year.
