Major Customers and Concentrations of Credit Risk - Additional Information (Detail) (USD $)	6 Months Ended		3 Months Ended
	Jun. 30, 2012	Jun. 30, 2012 Maximum	Jun. 30, 2012 Regional Enterprises, Inc. General Chemical Corporation	Jun. 30, 2012 Regional Enterprises, Inc. Suffolk Sales	Jun. 30, 2012 Regional Enterprises, Inc. SGR Energy LLC	Jun. 30, 2012 Regional Enterprises, Inc. MeadWestvaco Specialty Chemicals, Inc.
Concentration Risk [Line Items]
Concentration risk, revenues percentage			17.00%	16.00%	15.00%	5.00%
Concentration risk, accounts receivable percentage			28.00%	25.00%	3.00%	10.00%
Amount insured by Federal Deposit Insurance Corporation per institution		$ 250,000
FDIC insurance coverage date	Dec. 31, 2012