Cramer's lightning round: Start a position in DexCom
DexCom : "Let's start a position in Dexcom if we haven't owned it."

NIU Technologies : "I have to do more work on NIU, but I know that they are the premier scooter maker."

Quidel : "I like the diagnostics segment so much. ... I think Quidel's good. I think you've got a winner. I like that stock."

Gan Ltd : "I can't figure this one out"