With shares of iRobot (NASDAQ:IRBT) having nearly doubled so far in 2013, some investors are wondering whether it might be time to take profits in the relatively small robot maker.

But it's seldom a good idea to sell a stock simply because the price has gone up, reminds Fool contributor Steve Symington in the following interview with the Fool's Alison Southwick. Instead, Steve says, it would take a much more significant underlying issue with iRobot's business to get him to think about parting with his shares.

What do you think? Would it be a bad idea for long-term investors to sell shares of iRobot now? Please watch the video below to get Steve's full take, then chime in using the comments section below.