Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Cash Flows From Operating Activities:
Net loss	$ (742)	$ (1,339)
Adjustments to reconcile net loss to cash (used in) provided by operating activities:
Gain on building sale	(7,175)
Gain on equipment sale	(20)
Depreciation	171	312
Amortization	216	209
Stock-based compensation expense	619	493
Issuance of stock from treasury	137	16
Issuance of stock for directors’ fees	87
Reversal of provision for inventory reserves		(65)
Non cash pension expense	146	48
Deferred income taxes		(104)
Amortization of loan fees	154	144
Recovery of bad debt expense	(26)
Non cash interest expense	1	37
Amortization of right to use assets	722
Changes in operating assets and liabilities:
Accounts receivable	175	(33)
Inventories	(1,761)	(312)
Prepaid and other current assets	31	(503)
Lease liability	(570)
Other assets	(999)	302
Income taxes payable	(2)	6
Accounts payable, accrued expenses and accrued compensation	2,298	1,376
Net cash (used in) provided by operating activities	(6,538)	587
Cash Flows From Investing Activities:
Capital expenditures	(263)	(81)
Proceeds on building sale	9,765
Proceeds on sale of vehicles	25
Acquisition of licenses	(53)	(20)
Net cash provided by (used in) investing activities	9,474	(101)
Cash Flows From Financing Activities:
Net borrowings on line of credit	2,705	116
Repayment of former line of credit	(2,603)
Repayments of debt	(3,032)	(251)
Proceeds from exercise of stock options	7	40
Net cash used in financing activities	(2,923)	(95)
Net increase in cash	13	391
Cash, beginning of year	559	168
Cash, end of year	572	559
Supplemental Cash Flow Information:
Cash paid for interest	122	369
Cash paid for income taxes
Non cash investing and financing activities:
Capital expenditures financed by notes payable	5	15
Conversion of subordinated convertible debt to common stock	141	522
Cashless exercise of stock options		24
Right of uses assets obtained by lease obligations	$ 3,917