I believe the majority of managements warrants cannot be converted at this time and shouldn't be until the authorized shares are permitted to increase. It's true that they must either bring in cash to do so, or use the cashless option where they receive fewer shares. I believe that by the time the options are converted the share price will be so much higher that if cash is a problem, they can borrow on margin and each share will add to how much they can borrow.
Let's see what comes out at ASCO and the Annual Meeting, I believe that the shareholders will vote to authorize more shares and the share price will be high enough that it won't take that many shares to generate say $100 million.
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