The company issued a warning last year that often precludes bankruptcy.It's been a difficult few years for Plug Power (PLUG -0.32%), which has seen its stock fall from over $70 in early 2021 to under $4 today.In November 2023, when it filed its 10-Q for the third quarter, the company issued what is referred to as a "going concern" warning projecting that it may not have enough cash to fund its operations and capital expenditure requirements over the next 12 months. Such warnings are often a prelude to a com ...