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.

Fool contributor Steve Symington owns shares of iRobot. The Motley Fool recommends iRobot . Try any of our Foolish newsletter services free for 30 days. We Fools may not all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Motley Fool has a disclosure policy.