DEFERRED TAX (Summary of Deferred Tax Liability) (Details) (USD $)	Dec. 31, 2012	Dec. 31, 2011
Schedule Of Deferred Income Tax Assets and Liabilities [Line Items]
Deferred Tax Liabilities, Net, Noncurrent	$ 6,565,618	$ 6,388,537
Deferred Tax Liabilities, Net, Current	2,471,925	1,624,665
Accrual of system maintenance cost [Member]
Schedule Of Deferred Income Tax Assets and Liabilities [Line Items]
Deferred Tax Assets, Net, Noncurrent	48,453	33,146
Depreciation of fixed assets [Member]
Schedule Of Deferred Income Tax Assets and Liabilities [Line Items]
Deferred Tax Assets, Net, Noncurrent	22,933,886	25,527,126
Net investment in sales-type leases [Member]
Schedule Of Deferred Income Tax Assets and Liabilities [Line Items]
Deferred Tax Liabilities, Net, Noncurrent	(29,547,957)	(31,948,809)
Deferred Tax Liabilities, Net, Current	$ (2,471,925)	$ (1,624,665)