I'm very familiar with how warrants work. It is rare to see them on Pink Sheet stock. This structure is usually seen on big board stocks.
These warrants give the company the opportunity to raise a ton of money now and in the future with no fees or commissions paid to do so.
They expire in 2035 according to the filing if they are not exercised.
So technically a shareholder on record as of 4-15-20 could wire the company money and buy shares at $1.25, $1.50, $1.75 and $2.00 now because the strike price has been hit on all of them. So right now the O.S count is 7,797,004 shares.
If all the warrants are exercised the O.S. share count would be 155,940,080 shares. If warrants are exercised you will see it in future filings.
This kind of a set-up makes me think they want to list on Nasdaq or NYSE in the future if they can.