Ummm, no. North Korea exports lots and lots of coal as well as other minerals. Mostly to China. They also export technology. Iran has reportedly paid huge bucks for North Korean nuclear and rocket technology.
And let's not forget massive, ginormous statues loved by somewhat democratic leaders:
North Korea's 'biggest' export - giant statues - BBC News
The lardy Kim isn't budging yet:
North Korea says sanctions will accelerate nuclear programme - BBC News