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Income taxes
3 Months Ended
Mar. 31, 2020
Income taxes  
Income taxes

9.           Income taxes

During the three months ended March 31, 2020 and 2019, the Company did not record any income tax benefits for the net operating losses incurred or for the research and development tax credits generated in each period due to its uncertainty of realizing a benefit from those items.  All of the Company’s operating losses since inception have been generated in the United States.