When you move from California to Arizona and work remotely for a California company, you are no longer subject to taxation by the State of California. This holds true even though the company who employs you is located in California. This California company should withhold Arizona State Taxes for you.
If you moved to Arizona in 2015 and you've still been paying California taxes, then you will need to file a Part Year California return. Only the income you made while a California resident will be subject to taxation by California. You will likely receive a refund for the amount applicable to wages earned while an Arizona Resident. You will also owe Arizona taxes based on the amounts you earned while an Arizona Resident.
