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LEASES - Narrative (Details)
3 Months Ended 6 Months Ended
Jun. 30, 2019
USD ($)
Jun. 30, 2019
USD ($)
Leases [Abstract]    
Operating lease, weighted average remaining lease term (years) 4 years 6 months 4 years 6 months
Operating lease, weighted average discount rate, percent 5.40% 5.40%
Operating lease, payments $ 414,333 $ 810,516
Operating lease, cost 371,293 738,714
Short-term lease, cost $ 179,202 $ 344,688