Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
OPERATING ACTIVITIES
Net loss	$ (5,335,000)	$ (7,194,000)
Net (loss) income from discontinued operations	(8,000)	67,000
Loss from continuing operations	(5,327,000)	(7,261,000)
Adjustments to reconcile net loss to net cash used in operating activities
Depreciation and amortization	2,673,000	2,706,000
Deferred income tax expense	948,000	9,000
Loss on disposal of equipment	70,000	38,000
Board compensation issued in equity	311,000	0
Fair value of warrant issued upon conversion of subordinated debt to equity	304,000	0
Stock-based compensation	49,000	361,000
Amortization of debt issuance costs and discount	8,000	95,000
Provision for bad debt expense	3,000	298,000
Changes in operating assets and liabilities
Accounts receivable	156,000	4,674,000
Inventories	5,000	85,000
Prepaid expense and other current assets	(1,078,000)	68,000
Income taxes receivable	0	(14,000)
Amortization of operating lease assets	422,000	416,000
Other assets	46,000	320,000
Accounts payable and accrued liabilities	(260,000)	(2,365,000)
Operating lease liabilities	(416,000)	(416,000)
Other liabilities	(40,000)	(30,000)
Net cash used in operating activities - continuing operations	(2,126,000)	(1,016,000)
Net cash provided by operating activities - discontinued operations	4,000	134,000
Net cash used in operating activities	(2,122,000)	(882,000)
INVESTING ACTIVITIES
Purchases of property and equipment	(195,000)	(306,000)
Proceeds from insurance claims	0	294,000
Proceeds from disposals of property and equipment	65,000	335,000
Net cash (used in) provided by investing activities - continuing operations	(130,000)	323,000
Net cash provided by investing activities - discontinued operations	0	681,000
Net cash (used in) provided by investing activities	(130,000)	1,004,000
FINANCING ACTIVITIES
Gross proceeds from stock issuance	9,660,000	0
Stock issuance costs and registration fees	(815,000)	0
Term loan repayment	(72,000)	(49,000)
Net line of credit (repayments) borrowings	(701,000)	(2,001,000)
TDR accrued future interest payments	(397,000)	0
Payments of finance leases	(83,000)	(245,000)
Net cash provided by (used in) financing activities - continuing operations	4,592,000	(355,000)
Net cash used in financing activities - discontinued operations	(1,000)	(1,000)
Net cash provided by (used in) financing activities	4,591,000	(356,000)
Net Increase (Decrease) in Cash and Cash Equivalents	2,339,000	(234,000)
Cash and Cash Equivalents, beginning of period	1,467,000	663,000
Cash and Cash Equivalents, end of period	3,806,000	429,000
Supplemental Cash Flow Information:
Cash paid for interest	413,000	1,026,000
Supplemental Disclosure of Non-cash Investing and Financing Activities:
Non-cash conversion of subordinated debt and accrued interest to common stock	1,312,000	0
Non-cash conversion of unamortized subordinated debt discount	61,000	0
Equipment Term Loan [Member]
FINANCING ACTIVITIES
Term loan repayment	(3,000,000)	0
Paycheck Protection Program CARES Act [Member]
FINANCING ACTIVITIES
Proceeds from PPP loan	$ 0	$ 1,940,000