Not-greater-than in SQLite

I have a query that I want to filter out all the results if a column is 1 or greater (if it's 0, NULL, or empty, I want to keep it in the results).

So I thought I'd use !< per this page, but when I try

WHERE column_name !< 0 

I get the error

'SQLSTATE[HY000]: General error: 1 unrecognized token: "!<"' 

Is the tutorial page wrong? How else would I do this query?