What is the penalty for no-show at a child support evasion hearing in Kansas?

My ex and I have been to court 5 times in the past 11 months for his back child support-(I waived his previous support delinquency of $11,000 and suspended support for a year before I had it reinstated). I didn't go to the last scheduled hearing earlier this month because I was tired of hearing him lie to the courts and get away with it. I just received a letter that stated that he did not go to the last hearing and now has a bench warrant out for his arrest. What kind of penalty might he face?