This is not money that is "due." The "Derivative Liability" is an ongoing counter of the costs related to the convertible debt that was settled in Q1-17. This will eventually fall to the bottom line as a financing expense, but is not something that needs to be paid.
That leaves the portion that we are all used to thinking of as liabilities (AP, NP, etc) at $1.611m, not 6.422m. IMO.
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