SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Revenue Recognition (Details)	6 Months Ended
Jun. 30, 2012
Summary of Significant Accounting Policies [Abstract]
service income revenue percentage	3.00%

service income revenue percentage as a proportion of total income in a period

No definition available.

Name:	emri_ServiceIncomeRevenuePercentage
Namespace Prefix:	emri_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration