Summary of Significant Accounting Policies - Additional Information (Detail) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Summary Of Significant Accounting Policies [Line Items]
Percentage of equity interests	99.00%		99.00%
Value added tax rate levied on majority of products			17.00%
Minimum likelihood of tax benefits being realized upon settlement	50.00%		50.00%
Equity interests not consolidated	1.00%		1.00%
Depreciation expense	$ 191,526	$ 195,130	$ 384,336	$ 380,693
Land use rights
Summary Of Significant Accounting Policies [Line Items]
Finite lived intangible assets, useful Life			50 years
Finite lived intangible assets amortization period			2059
Amortization expense	$ 16,726	$ 16,613	$ 33,585	$ 33,027
Minimum
Summary Of Significant Accounting Policies [Line Items]
Retention receivable percentage	5.00%		5.00%
Service revenue billing period			2 months
Portion of project contract balance withheld period			12 months
Product Control Equipment Period			1 month
Minimum | Accounts Receivable
Summary Of Significant Accounting Policies [Line Items]
Customers billing period			30 days
Maximum
Summary Of Significant Accounting Policies [Line Items]
Retention receivable percentage	10.00%		10.00%
Service revenue billing period			3 months
Portion of project contract balance withheld period			24 months
Product Control Equipment Period			6 months
Maximum | Accounts Receivable
Summary Of Significant Accounting Policies [Line Items]
Customers billing period			90 days