Summary of Financial Statements of Affiliate (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Schedule of Equity Method Investments [Line Items]
Current assets	$ 6,300,033	$ 6,224,234	$ 6,509,736
Non-current assets	430,196	255,709	540,518
Total Assets	6,730,229	6,479,943	7,050,254
Current liabilities	1,973,928	2,275,489	3,272,360
Non-current liabilities	770,531	687,019	1,203,826
Stockholders' equity	3,985,770	3,517,435	2,574,068
Total Liabilities and Stockholders' Equity	6,730,229	6,479,943	7,050,254
Revenues	14,468,307	13,779,288	12,538,711
Operating income	872,464	1,049,083	757,484
Net profit	766,996	299,422	516,482
Other comprehensive profit (loss):
Foreign currency translation adjustment	0	33,668	0
Comprehensive net profit	766,996	333,090	516,482
Company share of Net Profit	49,418	24,766	59,623
Equity investment in affiliate	$ 332,429	$ 283,011	$ 258,245