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DEBT - Notes Payable (Details) - USD ($) $ in Thousands			3 Months Ended		14 Months Ended
	Apr. 07, 2018	May 24, 2016	Mar. 31, 2019	Mar. 31, 2018	Apr. 07, 2018	Dec. 31, 2018	Dec. 31, 2016	Feb. 02, 2016	Apr. 07, 2011
Notes Payable
Outstanding balance			$ 3,506
Future minimum principal payments on notes payable
2019			138
2020			191
2021			201
2022			210
2023			219
Thereafter			2,547
Total			$ 3,506
Promissory note with Woodhaven Bank
Notes Payable
Face amount									$ 4,830
Interest rate									3.85%
Principal and interest payments	$ 30
Frequency of periodic payment	monthly
Effective interest rate			4.25%			4.25%
Interest expense			$ 38	$ 40
Outstanding balance			3,506			$ 3,552
Future minimum principal payments on notes payable
Total			3,506			3,552
Promissory note with Woodhaven Bank | Prime Rate
Notes Payable
Spread rate					0.60%
Promissory note with Eagle One LLC
Notes Payable
Face amount		$ 515
Interest rate		6.00%
Principal and interest payments		$ 6
Frequency of periodic payment		monthly
Interest expense			$ 1	7
Outstanding balance						414
Future minimum principal payments on notes payable
Total						$ 414
Related party notes payable
Notes Payable
Face amount								$ 1,500
Interest rate								3.75%
Interest expense				$ 14
PILOT Agreement
Notes Payable
Maximum borrowing capacity							$ 10,000
Interest rate							6.00%

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