DISCONTINUED OPERATIONS DISCONTINUED OPERATIONS (Financial Information for Discontinued Operations) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain on the sale of equipment	$ 0	$ (103)	$ 0	$ 322
Net income	$ 0	334	0	644
Receivables			(1,783)	5,039
Inventories			(772)	541
Other assets			83	(57)
Accounts payable			(426)	502
Other current liabilities			131	267
Net cash provided by operating activities			0	1,097
Proceeds from sale of property and equipment			0	2,180
Payments to Acquire Property, Plant, and Equipment			0	(48)
Net cash used in investing activities			$ 0	(280)
Waste Services Segment [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Revenue from services and product sales		2,077		4,006
Cost of sales for services		1,585		3,008
Selling, general, and administrative expenses		160		362
Gain on the sale of equipment		2		8
Net income		$ 334		644
Net income from discontinued operations				644
Depreciation and amortization				221
Net cash provided by operating activities				1,097
Net cash used in investing activities				(280)
Discontinued Operations [Member] | Waste Services Segment [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain on the sale of equipment				(8)
Receivables				43
Inventories				(16)
Other assets				(3)
Accounts payable				169
Other current liabilities				47
Proceeds from sale of property and equipment				8
Payments to Acquire Property, Plant, and Equipment				$ (288)