NOTES RECEIVABLE - Schedule of Notes Receivable (Details) $ in Thousands	Dec. 31, 2018 USD ($)
Note Amount, current	$ 1,500
Plus Accrued Interest, current	45
Note Balance per Balance Sheet, current	1,545
Notes receivable, non-current	1,493
Note Amount, current and non-current	3,500
Plus Accrued interest, current and non-current	45
Less Unamortized Note Discount, current and non-current	(507)
Note Balance per Balance Sheet, current and non-current	3,038
Notes Receivable - Laramide
Note Amount, current	1,500
Plus Accrued Interest, current	45
Note Balance per Balance Sheet, current	1,545
Note Amount, non-current	2,000
Less Unamortized Note Discount, non-current	(507)
Notes receivable, non-current	$ 1,493