Column detected as Text instead of Number

Possibly a simple question.

I'm connecting to a .csv file in OneDrive and one of my columns (-1 to 12 values) are being detected as text and I can't seem to find where to 'override' Power BI to force it to format the cells as a number.

I am not using Power BI Desktop, just the online service.  I can do this in Power BI Desktop, but my dataset does not seem to refresh after I publish the report to the service and update the csv file.

Seems like this should be simple enough, but I've only been playing with Power BI for a couple weeks.

Thanks for any help!