Retail segment contingency (Details Textual) (USD $)	3 Months Ended	6 Months Ended
Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Percentage Of Revenue, Retail Water Operations	36.00%	44.00%	38.00%	45.00%
Percentage Of Gross Profit, Retail Water Operations	51.00%	53.00%	52.00%	54.00%
Goodwill, Impairment Loss	$ 3,587,754

Loss recognized during the period that results from the write-down of goodwill after comparing the implied fair value of reporting unit goodwill with the carrying amount of that goodwill. Goodwill is assessed at least annually for impairment.

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+ Details