Quarterly report pursuant to Section 13 or 15(d)

Concentrations (Details Textual)

v3.19.1
Concentrations (Details Textual)
3 Months Ended 12 Months Ended
Mar. 31, 2019
USD ($)
Customer / Integer
Supplier / Integer
Dec. 31, 2018
USD ($)
Customer / Integer
Supplier / Integer
Concentrations (Textual)    
Concentration risk, percentage 100.00% 100.00%
10% or more of purchase [Member] | Outstanding accounts payable [Member]    
Concentrations (Textual)    
Concentration risk, percentage 91.90% 95.50%
Number of supplier | Supplier / Integer 1 1
More than 10% Revenues [Member] | Outstanding accounts and tenants receivable [Member]    
Concentrations (Textual)    
Concentration risk, percentage 46.60% 56.00%
Number of customer | Customer / Integer 2 2
PRC [Member]    
Concentrations (Textual)    
Uninsured cash balances $ 814,166 $ 1,216,485
Cash balances in excess of FDI $ 374,000 $ 239,000