XML 35 R35.htm IDEA: XBRL DOCUMENT v2.4.1.9
6. Accounts Receivable: and other receivable - Accounts Receivable and other receivable (Details) (USD $)
Mar. 31, 2015
Dec. 31, 2014
Reserve for Doubtful accounts $ 24,448us-gaap_AllowanceForDoubtfulAccountsReceivable $ 27,294us-gaap_AllowanceForDoubtfulAccountsReceivable
Accounts Receivable 185,448us-gaap_AccountsAndNotesReceivableNet 164,832us-gaap_AccountsAndNotesReceivableNet
Treatment Program    
Accounts Receivable 209,926us-gaap_OtherReceivables
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= GRST_TreatmentProgramMember
175,585us-gaap_OtherReceivables
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= GRST_TreatmentProgramMember
Outpatient Services    
Accounts Receivable    $ 16,541us-gaap_OtherReceivables
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= GRST_OutpatientServicesMember