SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Goodwill, Other Intangible Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Jul. 01, 2015
Finite-Lived Intangible Assets
Gross Carrying Amount	$ 2,233	$ 2,230
Accumulated Amortization Amount	710	491
Net Book Value Amount	1,523	1,739
Amortization expense	219	237
Estimated future annual amortization expense
2019	219
2020	191
2021	185
2022	185
2023	185
Thereafter	541
Total	1,506
Goodwill and Other Intangible Assets
Impairment of Goodwill	0	908
Goodwill	2,375	2,375	$ 3,283
Devicix, LLC
Goodwill and Other Intangible Assets
Impairment of Goodwill	$ 0	$ 908
Goodwill				$ 3,200
Customer Relationships
Finite-Lived Intangible Assets
Remaining lives	9 years	9 years
Gross Carrying Amount	$ 1,302	$ 1,302
Accumulated Amortization Amount	506	361
Net Book Value Amount	$ 796	$ 941
Intellectual Property
Finite-Lived Intangible Assets
Remaining lives	3 years	3 years
Gross Carrying Amount	$ 100	$ 100
Accumulated Amortization Amount	61	28
Net Book Value Amount	$ 39	$ 72
Trade Names
Finite-Lived Intangible Assets
Remaining lives	20 years	20 years
Gross Carrying Amount	$ 814	$ 814
Accumulated Amortization Amount	143	102
Net Book Value Amount	$ 671	$ 712
Other
Finite-Lived Intangible Assets
Remaining lives	7 years	7 years
Gross Carrying Amount	$ 17	$ 14
Net Book Value Amount	$ 17	$ 14