Government Programs (Details)	1 Months Ended						12 Months Ended
	May 31, 2017 USD ($)	Dec. 31, 2016 AUD	Jul. 31, 2016 USD ($)	Mar. 31, 2016 AUD	Mar. 31, 2016 USD ($)	Sep. 30, 2015 USD ($)	Dec. 31, 2017 AUD	Dec. 31, 2017 USD ($)	Dec. 31, 2016 AUD	Dec. 31, 2016 USD ($)	Dec. 31, 2015 AUD	Dec. 31, 2015 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)
Government Programs
Research and development tax incentive receivable													$ 1,347,000	$ 2,241,000
SBIR Grant
Government Programs
Reduction of research and development expenses related to tax								$ 182,000		$ 169,000		$ 155,000
Research and development grants	$ 1,300,000		$ 219,000			$ 224,000
Grants receivable													58,000	100,000
Australian
Government Programs
Reduction of research and development expenses related to tax							AUD 1,700,000	$ 1,300,000	AUD 5,300,000	$ 4,000,000	AUD 978,000	$ 736,000
Australian | Australia | Minimum
Government Programs
Percentage of research and development expenditures for a project incurred in geographic area of tax incentive for availability of research and development tax incentive		50.00%					50.00%	50.00%
Overseas Findings | Australian
Government Programs
Research and development tax incentive receivable		AUD 3,100,000					AUD 1,700,000		AUD 3,100,000				$ 1,300,000	$ 2,200,000
Deferred tax incentive				AUD 237,000	$ 182,000