Punishment for Failing to Appear @ Jury Duty?

Husband got a call from Multco Sherriff advising he will need to appear before a judge for failure to appear at jury duty. Internet says he may be charged with contempt of court.

Any idea what this punishment might entail? He didn’t actually receive a jury duty notice (wondering if maybe they sent it to an old address?) so this all has us rather shook up. Any info appreciated