I need to build / find a tool for parsing EDGAR filings for their financial statements tables (not so bad) and parsing those financial tables into usable inform

I need to build / find a tool for parsing EDGAR filings for their financial statements tables (not so bad) and parsing those financial tables into usable information (pretty bad, the tables have very bad and often inconsistent HTML layouts). Any suggestions to where I should be looking? Python? XSLT?