how long before flaxseed powder goes "bad"?

i've had a bottle of cold rolled organic flaxseed powder, with no preservatives, in my fridge for about two years. it's been unsealed, but, mostly, unopened, during that time. power to the appliance has gone out once, to my recollection - perhaps for as long as eight hours - and the door gets opened about as often as one would imagine. the powder has no particular odour. is it still "good"? does it still contain the nutrients i'm looking for (if somewhat belatedly), principally the omega-3 fatty acids, or is it, likely, without nutritive value, and, possibly, actually rotten?