I think things are worse. Here's why (and the explanation is below): Warrants that are worth 800K can't fall in value by 6.6 million dollars again.
They "earned" 6,629,000 dollars because the stock price fell and their warrant liability fell in value.
Change in fair value of warrant liability 6,629
As of March 31, 2017 and December 31, 2016, the fair value of the warrant liability was $0.8 million and $7.4 million, respectively. http://investors.mannkindcorp.com/sec.cfm
Note: Most of Mannkind's earnings came about because the stock price tumbled and that is a fact!
Since that 6.6 million is showing up as cashflow they are really burning 2.2 million more per month than most people realize.