The iconic photography brand Kodak is on the ropes. The company's shares plummeted more than 25% on Tuesday after it warned investors that it risks being unable to continue operating much longer. In a filing, the firm admitted that it does not have "committed financing or available liquidity" to pay the next $500 million in debt obligations. "These conditions raise substantial doubt about the company's ability to continue as a going concern," Kodak said in a statement.