CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited Consolidated Condensed) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Operating activities:
Net income (loss)	$ 365	$ (1,160)
Adjustments to reconcile net income (loss) to cash used in operating activities:
Depreciation and amortization	176	155
Loss on disposal of equipment and leasehold improvements		16
Share-based compensation	99	115
Amortization of debt discount	134
Changes in assets and liabilities related to operations:
Trade accounts receivable	(1,240)	(823)
Inventories	97	149
Prepaid expenses and other assets	(295)	(78)
Accounts payable	(429)	(224)
Accrued expenses	127	(54)
Deferred revenue	(271)
Other long-term assets and liabilities	(9)	(36)
Net cash used in operating activities	(1,246)	(1,940)
Investing activities:
Acquisition of equipment and leasehold improvements	(276)	(389)
Net cash used in investing activities	(276)	(389)
Financing activities:
Principal payments on finance leases	(116)	(107)
Proceeds from line of credit, bank	1,000	500
Payments to the line of credit, bank	(1,000)	(500)
Proceeds from line of credit, related party	6,860	5,846
Payments to line of credit, related party	(5,595)	(5,432)
Proceeds from PPP / SBA loan	952
Proceeds from issuance of common stock		1,676
Proceeds from stock option exercises		16
Net cash provided by financing activities	2,101	1,999
Increase (decrease) in cash and cash equivalents	579	(330)
Cash and cash equivalents at beginning of period	1,194	1,345
Cash and cash equivalents at end of period	1,773	1,015
Supplemental cash flow information:
Interest paid	57	86
Supplemental non-cash investing and financing activities:
Accounts payable incurred for the purchase of equipment and leasehold improvements	$ 1	$ 39