CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited Consolidated Condensed) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Operating activities:
Net loss	$ (167)	$ (513)
Adjustments to reconcile net loss to cash used in operating activities:
Depreciation and amortization	86	77
Loss on disposal of equipment and leasehold improvements		16
Share-based compensation	52	57
Amortization of debt discount	67
Changes in assets and liabilities related to operations:
Trade accounts receivable	(1,284)	(1,276)
Inventories	170	14
Prepaid expenses and other assets	8	(136)
Accounts payable	(35)	133
Accrued expenses	133	109
Deferred revenue	(207)
Other long-term assets and liabilities	(3)	(18)
Net cash used in operating activities	(1,180)	(1,537)
Investing activities:
Acquisition of equipment and leasehold improvements	(181)	(240)
Net cash used in investing activities	(181)	(240)
Financing activities:
Principal payments on finance leases	(58)	(52)
Proceeds from line of credit, bank	500	500
Payments to the line of credit, bank	(500)
Proceeds from line of credit, related party	3,260	2,936
Payments to line of credit, related party	(2,084)	(2,320)
Net cash provided by financing activities	1,118	1,064
Decrease in cash and cash equivalents	(243)	(713)
Cash and cash equivalents at beginning of period	1,194	1,345
Cash and cash equivalents at end of period	951	632
Supplemental cash flow information:
Interest paid	57	30
Supplemental non-cash investing and financing activities:
Accounts payable incurred for the purchase of equipment and leasehold improvements	$ 77	$ 40