Significant Accounting Policies - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Significant Accounting Policies [Line Items]
Deferred revenue	$ 1,628,264	$ 824,845
Sales commissions	726,000	951,000
Percentage of cash discount offered to customers	2.00%
Deferred tax assets, valuation allowance	30,900,000	30,174,000
Total deferred tax assets	30,909,000	30,174,000
Advertising Expense	18,000	33,000
Customer Payment [Member]
Significant Accounting Policies [Line Items]
Deferred revenue	$ 576,191