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Government Programs (Details)
$ in Thousands, $ in Millions
3 Months Ended
Mar. 31, 2020
AUD ($)
Mar. 31, 2020
USD ($)
Mar. 31, 2019
AUD ($)
Mar. 31, 2019
USD ($)
Mar. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
Government Programs            
Research and development tax incentive receivable         $ 153  
SBIR Grant            
Government Programs            
Reduction of research and development expenses related to tax   $ 300   $ 200    
Grants receivable         300 $ 300
Australian            
Government Programs            
Reduction of research and development expenses related to tax $ 0.3 $ 200 $ 0.6 $ 400    
Overseas Findings | Australian            
Government Programs            
Research and development tax incentive receivable $ 0.3       $ 200 $ 0