Nature of Business and Liquidity - Incentive and Tax (Details) - Australian Taxation Office - USD ($) $ in Millions	3 Months Ended	12 Months Ended
Sep. 30, 2019	Dec. 31, 2019
Research and development
Research and development incentive and tax receivable	$ 8.3	$ 8.3
Research and development incentive tax credit	$ 8.3	$ 8.3

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