XML 50 R19.htm IDEA: XBRL DOCUMENT v2.4.1.9
Summary of Significant Accounting Policies (Details) (Ethanol [Member])
 6 Months Ended
Apr. 30, 2015
gal
Ethanol [Member]
  
Product Information [Line Items]  
Annual Production Capacity 50,000,000highwater_AnnualProductionCapacity
/ us-gaap_ProductOrServiceAxis
= highwater_EthanolMember