There is some truth to that. NK is only nominally socialist, however, its actual ideology is 'Juche', military-focussed totalitarian isolationism with a massive cult of personality around essentially a royal family of dictators (even having a dead former leader assume a nominally powerful position forever - the Eternal President!)
Edit: Social coordination of the means of production, as opposed to coordination by market forces, is in fact the definition of socialism. Whether it's done by a state or various small groups doesn't matter - both are just variations of socialism. Both are about economic planning.
