ACQUISITIONS (Details) - USD ($)	Dec. 05, 2014	May. 02, 2014
Omega Refining
Business Acquisition [Line Items]
Cash and cash equivalents		$ 406,000
Accounts receivable		950,000
Inventory		4,192,000
Prepaid expenses		71,000
Property, plant and equipment		30,000,000
Deposits		400,000
Bango secured note issued by Vertex		8,308,000
Technology		2,287,000
Non-compete agreements		66,000
Total identifiable net assets		46,680,000
Less liabilities assumed, including contingent consideration		(7,670,000)
Gain on purchase		(6,574,000)
Total purchase price		$ 32,436,000
Heartland Group Holdings, LLC
Business Acquisition [Line Items]
Inventory	$ 2,248,000
Property, plant and equipment	7,543,000
Total identifiable net assets	12,382,000
Gain on purchase	(375,000)
Total purchase price	12,007,000
Customer relationships | Heartland Group Holdings, LLC
Business Acquisition [Line Items]
Finite-lived intangible assets	352,000
Vendor relationships | Heartland Group Holdings, LLC
Business Acquisition [Line Items]
Finite-lived intangible assets	1,876,000
Tradename | Heartland Group Holdings, LLC
Business Acquisition [Line Items]
Finite-lived intangible assets	$ 363,000