While its rivals Domino’s (NYSE: DPZ) and Papa John’s (NASDAQ: PZZA) keep delivering year-over-year sales gains, Papa Murphy’s (NASDAQ: FRSH) saw its 2016 sales go in the opposite direction. The cook-at-home pizza chain saw domestic systemwide comparable-store sales decrease 7.8% for the quarter and 5.2% for the fiscal year, according to a company estimate.