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LEASES - Narrative (Details)
3 Months Ended
Mar. 31, 2019
USD ($)
Leases [Abstract]  
Operating lease, weighted average remaining lease term (years) 4 years 3 months 7 days
Operating lease, weighted average discount rate, percent 5.41%
Operating lease, payments $ 396,183
Operating lease, cost 367,421
Short-term lease, cost $ 165,486