Schedule II - Valuation and Qualifying Accounts (Detail) - Valuation and Qualifying Accounts (Allowance for Doubtful Accounts [Member], USD $)	12 Months Ended
	Dec. 31, 2012		Dec. 31, 2011
Allowance for doubtful accounts
Charged to Costs and Expenses	$ 89,033		$ 9,889
Deductions (1)	(84,894)	[1]	(45,347)	[1]
Begining Balance [Member]
Allowance for doubtful accounts
Balances at Beginning of Period	37,410		72,868
Balances at End of Period	37,410		72,868
Ending Balance [Member]
Allowance for doubtful accounts
Balances at Beginning of Period	41,548		37,410
Balances at End of Period	$ 41,548		$ 37,410

[1] Uncollectible accounts written off, net of recoveries.