CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited Consolidated Condensed) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Operating activities:
Net loss	$ (513)	$ (924)
Adjustments to reconcile net loss to cash used in operating activities:
Depreciation and amortization	77	85
Loss on disposal of equipment and leasehold improvements	16
Share-based compensation	57	43
Changes in assets and liabilities related to operations:
Trade accounts receivable	(1,276)	(262)
Inventories	14	165
Prepaid expenses and other assets	(136)	(61)
Accounts payable	133	142
Accrued expenses	109	194
Other long-term assets and liabilities	(18)
Net cash used in operating activities	(1,537)	(618)
Investing activities:
Acquisition of equipment and leasehold improvements	(240)	(5)
Net cash used in investing activities	(240)	(5)
Financing activities:
Principal payment on finance leases	(52)	(42)
Proceeds from line of credit, bank	500	200
Payments to the line of credit, bank		(300)
Proceeds from line of credit, related party	2,936
Payments to line of credit, related party	(2,320)
Net cash provided by financing activities	1,064	(142)
Decrease in cash and cash equivalents	(713)	(765)
Cash and cash equivalents at beginning of period	1,345	1,955
Cash and cash equivalents at end of period	632	1,190
Supplemental cash flow information:
Interest paid	30	11
Supplemental non-cash investing and financing activities:
Accounts payable incurred for the purchase of equipment and leasehold improvements	$ 40	$ 30