Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
OPERATING ACTIVITIES
Net loss	$ (2,173,000)	$ (2,837,000)
Net (loss) income from discontinued operations	(8,000)	36,000
Net loss from continuing operations	(2,165,000)	(2,873,000)
Adjustments to reconcile net loss to net cash used in operating activities
Depreciation and amortization	1,336,000	1,396,000
Loss on disposal of equipment	51,000	15,000
Board compensation issued in equity	311,000
Stock-based compensation	24,000	39,000
Amortization of debt issuance costs and discount	8,000	47,000
Provision for bad debt expense	38,000	300,000
Changes in operating assets and liabilities
Accounts receivable	(1,476,000)	429,000
Inventories	(39,000)	39,000
Prepaid expense and other current assets	(113,000)	333,000
Amortization of operating lease assets	210,000	230,000
Other assets	2,000	15,000
Accounts payable and accrued liabilities	(556,000)	(869,000)
Operating lease liabilities	(206,000)	(204,000)
Other liabilities	(45,000)
Net cash used in operating activities - continuing operations	(2,620,000)	(1,103,000)
Net cash (used in) provided by operating activities - discontinued operations	(2,000)	134,000
Net cash used in operating activities	(2,622,000)	(969,000)
INVESTING ACTIVITIES
Purchases of property and equipment	(45,000)	(164,000)
Proceeds from disposals of property and equipment	13,000
Net cash used in investing activities - continuing operations	(32,000)	(164,000)
Net cash provided by investing activities - discontinued operations		178,000
Net cash (used in) provided by investing activities	(32,000)	14,000
FINANCING ACTIVITIES
Gross proceeds from stock issuance	9,660,000
Stock issuance costs and registration fees	(815,000)
Term loan repayment	(25,000)	(23,000)
Net line of credit (repayments) borrowings	(701,000)	595,000
TDR accrued future interest payments	(209,000)
Payments of finance leases	(22,000)	(30,000)
Net cash provided by financing activities - continuing operations	4,888,000	542,000
Net cash used in financing activities - discontinued operations	(1,000)	(33,000)
Net cash provided by financing activities	4,887,000	509,000
Net Increase (Decrease) in Cash and Cash Equivalents	2,233,000	(446,000)
Cash and Cash Equivalents, beginning of period	1,467,000	663,000
Cash and Cash Equivalents, end of period	3,700,000	217,000
Supplemental Cash Flow Information:
Cash paid for interest	220,000	537,000
Supplemental Disclosure of Non-cash Investing and Financing Activities:
Non-cash conversion of subordinated debt and accrued interest to common stock	1,312,000
Non-cash conversion of unamortized subordinated debt discount	61,000
Equipment Term Loan [Member]
FINANCING ACTIVITIES
Term loan repayment	$ (3,000,000)