To Toucan:
The more intriguing question is why did the company voluntarily delist, knowing that to do so would immediately wreck the PPS (and its market cap), and trigger a default on the convertible notes? Any CFO worth its salt could have delayed/appealed a delist notice for another month or two.
Why willingly shoot yourself in the chest when your PPS is trading at $1.90? It just doesn't make sense ... unless, of course, you had "other" plans.