Summary of Significant Accounting Policies - Additional Information (Detail) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014 lb	Jun. 30, 2013 lb	Dec. 31, 2013
Significant Accounting Policies [Line Items]
Entity Incorporation Date Of Incorporation			Jan. 11, 1991
Concentration risk, customer			two customers each accounted for 10% or more of the Company’s revenues	two customers each accounted for 10% or more of the Company’s revenues
Aggregate percentage of revenue the from customers accounted for more then 10%			28.00%	29.00%
Deferred tax asset	$ 5,294,000		$ 5,294,000		$ 5,570,000
Operating loss carryforwards, limitations on use			Approximately $10,600,000 of the Companys $16,000,000 of NOLs are subject to annual limitations of $1,300,000.
Options and warrants excluded from the calculation of diluted shares	80,843	50,000	80,843	50,000
Income Taxes Receivable, Current	1,699,000		1,699,000		2,709,000
Production and importation permission from government agency			30,000,000	63,000,000
Production and importation permission description			30 million pounds in 2015 and reduce by approximately 6 million pounds each year and end at zero in 2020.
Customer
Significant Accounting Policies [Line Items]
Accounts receivable, net	$ 1,230,000	$ 1,842,000	$ 1,230,000	$ 1,842,000