Contract worker living in Texas doing remote work for a CA company. Do I need to pay CA state taxes?

[plaid_mongoose]

I work from my house in TX and do remote design work for a company that is located in CA. I am a contract worker for them and they are my only client and my only source of income over the year. I get a 1099 from them. All of my work is actually done physically in the state of TX with the exception of a day and a half (12 hours) of work where I worked in the office in CA.

Do I need to pay CA state income taxes for all of the money I made that year or just for the day and a half I worked on site? 

[TomD8]

CA can tax non-residents only on CA-source income.  Income is "sourced" where the work is actually (physically) performed.  Therefore it is only that day-and-a-half income that is taxable by CA.