Great Lakes filed a notice of inability to file the 3rd Quarter (July 1 - September 30) 10-Q SEC report by the prescribed deadline.
"The management of Great Lakes Aviation, Ltd. (the “Company”) has determined that the Company is unable to file its Form 10-Q Quarterly Report for the period ended September 30, 2015 within the prescribed time period, without unreasonable effort and expense, due to the lack of personnel necessary to complete the information required for the filing on a timely basis. "
Evidently not only short on pilots!