An upgrade from Oppenheimer has pushed the stock of Capstone Turbine Corp. to its highest price in nearly a year. The Chatsworth manufacturer of small turbines has gained 44 percent in the last two days to close Thursday at $1.01. Prior to Thursday, the last time Capstone closed above the $1 threshold was Oct. 26, 2016. Analysts at Oppenheimer gave Capstone a $2 price target and predicted the company could reach breakeven on an EBITDA basis by 2019. EBITDA stands for earnings before interest, taxes, depreciation and amortization. The analysts said Capstone has weathered a difficult period, but the company has managed its cash well and is now in position for revenue and margin gains.