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6. PROPERTY, PLANT AND EQUIPMENT UNDER CAPITAL LEASES, NET (Details Narrative) - USD ($) | 3 Months Ended | 6 Months Ended
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Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2018 | Jun. 30, 2017
Property Plant And Equipment Under Capital Leases Net Details Narrative Abstract |  |  |  |
Depreciation and amortization expense | $ 69,115 | $ 75,413 | $ 138,397 | $ 150,470

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