LEASE LIABILITIES AND RIGHT OF USE ASSETS - Summary of lease expenses (Details)	6 Months Ended
	Jun. 30, 2019 USD ($)
Finance lease expenses:
Depreciation/amortization expense	$ 27,877
Interest on lease liabilities	2,693
Finance lease expense	30,570
Operating lease expense	114,120
Short-term lease expense	38,698
Total lease expenses	$ 183,388