Hey man, don't sweat it, this company should do well for years. As for LDK, that is the kind of company which I would take the money and run, as with CSIQ and anything that is related to commodities.
You may consider useing a trailing stop loss order in the future. Admitidly the market makers can see your order and may pull it down for a second just to take you out, but if you keep it low enough they can't do that.
Good call, it is a great little company with some great technology.
I first saw this little guy a year ago at 33 or so, I didn't take any action though as commodity stocks seemed to be the way to go at that point, now of course that play has run out of steam.
The sell off in NUVA seems to be the movements of large money doing some naked shorting and artificaily depressing the price so they can cash in their puts.
The stock held up well for a good time after they raised their guidence, I thought for sure that it would stick, however I failed to take into consideration the ability of large money jerking it around, oh well, that's the trouble with brokerage account, they never come with crystal balls.
The psychological effect of catching a double and not wanting to lose a big profit. I did the same with LDK some time back and after I sold it dropped significantly. I guess, just didn't want to get too greedy and end up losing a big chunk of profit. However, looks like I should have waited a day to buy.