"Nonresidents must file an Idaho income tax return if their gross income from Idaho sources is more than $2,500. "
Also "Gross Income means all income from all sources before applying expenses or deductions. This includes compensation for services, gross income of a business, interest, rents, dividends, and gains from the sale of property." (both are found at <a rel="nofollow" target="_blank" href="
https://tax.idaho.gov/i-1039.cfm">https://tax.idaho.gov/i-1039.cfm</a>)
So it looks like you need to file an Idaho state individual tax return.
