Hydrogen supplier Plug Power (NASDAQ:PLUG) stock fell over 9% overnight despite saying it no longer has a “going concern” problem.The company said it has “sufficient cash on hand coupled with available liquidity” to fund its operations for the foreseeable future. However, it still posted a large loss of $1.37 billion,$2.30 per share, on revenue of $891 million for the year.PLUG stock is expected to open this morning at$3.21 per share, a market capitalization of under $2.2 billion.Plugging Back In?The loss ...