DEFERRED TAX (Summary of Deferred Tax Liability) (Details) (USD $)	Mar. 31, 2013	Dec. 31, 2012
Schedule Of Deferred Income Tax Assets and Liabilities [Line Items]
Deferred Tax Liabilities, Net, Noncurrent	$ 7,161,882	$ 6,565,618
Deferred Tax Liabilities, Net, Current	2,652,145	2,471,925
Accrual of system maintenance cost [Member]
Schedule Of Deferred Income Tax Assets and Liabilities [Line Items]
Deferred Tax Assets, Net, Noncurrent	80,968	48,453
Depreciation of fixed assets [Member]
Schedule Of Deferred Income Tax Assets and Liabilities [Line Items]
Deferred Tax Assets, Net, Noncurrent	25,319,299	22,933,886
Net investment in sales-type leases [Member]
Schedule Of Deferred Income Tax Assets and Liabilities [Line Items]
Deferred Tax Liabilities, Net, Noncurrent	(32,562,149)	(29,547,957)
Deferred Tax Liabilities, Net, Current	$ (2,652,145)	$ (2,471,925)