Consolidated Statements of Cash Flows - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
OPERATING ACTIVITIES
Net income (loss)	$ (7,652,000)	$ (5,865,000)
Net loss from discontinued operations	(2,332,000)	(1,807,000)
Net loss from continuing operations	(5,320,000)	(4,058,000)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	5,692,000	4,871,000
(Gain) loss on disposal of equipment	(73,000)	(104,000)
Impairment loss	127,000	0
Gain on settlement	(1,252,000)
Change in fair value of warrants		540,000
Stock-based compensation	275,000	393,000
Amortization of debt issuance costs and discount	321,000	297,000
Lease termination expense	62,000
Provision for bad debt expense	160,000	31,000
Changes in operating assets and liabilities
Accounts receivable	3,257,000	988,000
Inventories	116,000	38,000
Prepaid expenses and other current assets	17,000	1,079,000
Income taxes receivable	43,000	(28,000)
Amortization of operating lease assets	736,000
Other assets	274,000	(120,000)
Accounts payable and accrued liabilities	1,328,000	(2,806,000)
Operating lease liabilities	(727,000)
Other liabilities	44,000	25,000
Net cash provided by operating activities - continuing operations	5,080,000	1,146,000
Net cash (used in) provided by operating activities - discontinued operations	(613,000)	190,000
Net cash provided by operating activities	4,467,000	1,336,000
INVESTING ACTIVITIES
Acquisition of Adler Hot Oil Service, LLC		(6,164,000)
Purchases of property and equipment	(1,191,000)	(1,058,000)
Proceeds from insurance claims	49,000	122,000
Proceeds from disposal of equipment	284,000	578,000
Net cash used in investing activities - continuing operations	(858,000)	(6,522,000)
Net cash provided by (used in) investing activities - discontinued operations	400,000	(752,000)
Net cash used in investing activities	(458,000)	(7,274,000)
FINANCING ACTIVITIES
Net line of credit borrowings	61,000	6,728,000
Proceeds from issuance of long-term debt	500,000
Repayment of long-term debt	(3,700,000)	(800,000)
Repayment of note	(115,000)	(93,000)
Payments of finance leases	(326,000)
Other financing	(1,000)	(31,000)
Net cash provided by financing activities - continuing operations	(3,581,000)	5,804,000
Net cash used in financing activities - discontinued operations	(22,000)
Net cash (used in) provided by investing activities	(3,603,000)	5,804,000
Net decrease in Cash and Cash Equivalents	406,000	(134,000)
Cash and Cash Equivalents, beginning of period	257,000	391,000
Cash and Cash Equivalents, end of period	663,000	257,000
Supplemental cash flow information:
Cash paid for interest	2,281,000	1,838,000
Cash paid (refunded) for income taxes	32,000	32,000
Supplemental Disclosure of Non-cash Investing and Financing Activities:
Non-cash proceeds from revolving credit facilities	125,000	141,000
Cashless exercise of stock options		994,000
Non-cash proceeds from warrant exercise		500,000
Non-cash subordinated debt principal repayment		(500,000)
Non-cash conversion of warrant liability to equity		1,371,000
Non-cash proceeds from subordinated debt borrowings		4,800,000
Non-cash repayment of revolving credit facility