Income Taxes (Details) - USD ($)	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Income Taxes
Income tax (benefit) expense	$ (2,137,000)	$ 1,071,000
Effective tax rate	21.00%
MITL corporate income tax rate	37.50%
MITL corporate income tax rate excluding mining tax	30.00%
Mining tax rate	7.50%
Minerals Tax Rate	5.00%
Withholding tax on dividends	10.00%
Dividend withholding tax between countries	5.00%
Liability for uncertain tax positions	$ 0