1.0.0.3 false Subsequent Events false 1 $ false false Shares Standard http://www.xbrl.org/2003/instance shares xbrli 0 Unit1 Divide http://www.xbrl.org/2003/iso4217 USD iso4217 http://www.xbrl.org/2003/instance shares xbrli 0 USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 2 Subsequent Events [Abstract] 0 esv_SubsequentEvents esv false na duration string Subsequent Events [Abstract] false false false false false true false false false 1 false false 0 0 false false Subsequent Events [Abstract] false 3 Subsequent Events 1 us-gaap_ScheduleOfSubsequentEventsTextBlock us-gaap true na duration string No definition available. false false false false false false false false false 1 false false 0 0 <div><!-- 2.0.3575.42361 --><div><!-- body --><p style="margin-right: 0in; margin-left: 0in; font-size: 12.0pt; font-family: 'Times New Roman','serif';"><a name="_AUC6d36636488cc4759ae7f75b0034fe500"><b><font style="font-size: 10.0pt;" class="_mt">Note 11 - Subsequent Events</font></b></a></p> <p style="margin-right: 0in; margin-left: 0in; font-size: 12.0pt; font-family: 'Times New Roman','serif';"><font class="_mt"><font style="font-size: 10.0pt;" class="_mt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;During the second quarter of 2009, we adopted FASB ASC 855 (previously SFAS No. 165, &quot;Subsequent Events&quot;) which establishes general standards regarding the accounting for and disclosure of events that occur after the balance sheet date but before financial statements are issued or are available to be issued. Adoption of this standard did not result in significant changes in the subsequent events that we are required to recognize or disclosure in our financial statements.</font></font></p> <font class="_mt"><font style="font-size: 10.0pt; font-family: 'Times New Roman','serif';" class="_mt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;We account for and disclose events that occur after the balance sheet date but before financial statements are issued or are available to be issued. We evaluated subsequent events through October 22, 2009, the date these condensed consolidated financial statements were filed with the SEC.<!--EndFragment--></font></font><!-- body --></div></div> Note 11 - Subsequent Events &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;During the second quarter of 2009, we adopted FASB ASC 855 (previously SFAS No. 165, false false No definition available. No authoritative reference available. false false 1 2 false UnKnown UnKnown UnKnown false true