CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited Consolidated Condensed) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Operating activities:
Net Income (loss)	$ 1,310	$ (167)
Adjustments to reconcile net income (loss) to cash used in operating activities:
Depreciation and amortization	101	86
Amortization of debt discount	67	67
Share-based compensation	42	52
Gain from PPP loan forgiveness	(952)
Changes in assets and liabilities related to operations:
Trade accounts receivable	(896)	(1,284)
Inventories	(661)	170
Prepaid expenses and other assets	(47)	8
Accounts payable	253	(35)
Accrued expenses	571	133
Deferred revenue	84	(207)
Other long-term assets and liabilities	(9)	(3)
Net cash used in operating activities	(137)	(1,180)
Investing activities:
Acquisition of equipment and leasehold improvements	(166)	(181)
Net cash used in investing activities	(166)	(181)
Financing activities:
Principal payments on finance leases	(46)	(58)
Proceeds from line of credit, bank	500	500
Payments to line of credit, bank	(500)	(500)
Proceeds from line of credit, related party	6,500	3,260
Payments to line of credit, related party	(5,289)	(2,084)
Net cash provided by financing activities	1,165	1,118
Increase (decrease) in cash and cash equivalents	862	(243)
Cash and cash equivalents at beginning of period	957	1,194
Cash and cash equivalents at end of period	1,819	951
Supplemental cash flow information:
Interest paid	51	57
Supplemental non-cash investing and financing activities:
Accounts payable incurred for the purchase of equipment and leasehold improvements	$ 69	$ 77