Shares of Coupa  (COUP - Get Report) , which makes cloud-based software, surged following their debut at the Nasdaq Thursday. Early in the trading day, the stock more than doubled from its $18 offer price. Coupa's software helps companies manage spending, and counts Groupon (GRPN - Get Report) , Salesforce  (CRM - Get Report) , and Staples  (SPLS)  as its customers. While the company has yet to turn a profit, it's seen revenue growth in the last 30 quarters. Coupa CEO Rob Bernshteyn says he's focused on building a recurring revenue stream and wouldn't project when Coupa would become profitable.