Government Programs (Details) $ in Millions	1 Months Ended			12 Months Ended
	Sep. 30, 2018 USD ($)	May 31, 2017 USD ($)	Jul. 31, 2016 USD ($)	Dec. 31, 2019 AUD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2018 AUD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 AUD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2019 USD ($)
Government Programs
Research and development tax incentive receivable, net							$ 1,429,000
SBIR Grant
Government Programs
Reduction of research and development expenses related to tax					$ 1,400,000		663,000		$ 182,000
Research and development grants	$ 1,500,000	$ 1,300,000	$ 219,000
Grants receivable							309,000			$ 304,000
Australian
Government Programs
Reduction of research and development expenses related to tax				$ 1.9	$ 1,300,000	$ 2.1	1,600,000	$ 1.7	$ 1,300,000
Overseas Findings | Australian
Government Programs
Research and development tax incentive receivable, net				$ 2.0			$ 1,400,000			$ 0