I published a blog posting on October 12, 2012 regarding Idaho Death Certificates, 1911-1937 for 105 people born in Greece.
Since that time FamilySearch.org has updated their Idaho Death Certificates database to include 367 for people born in Greece. - follow this link for FREE access to these records.
Statewide registration of deaths was required by law in 1911. The records are held at the State of Idaho Department of Health and Welfare. Earlier death records that may exist are held at the county level. Statewide registration of deaths began in 1911, and was generally complied with by the early 1920’s.