Condensed Statements Of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Cash flows used in operating activities
Net income (loss)	$ 91	$ (58)
Adjustments to reconcile net income (loss) to net cash used in operating activities:
Depreciation and amortization	231	238
Deferred income taxes	(6)	0
Stock-based compensation expense	8	7
Interest accrued on treasury bills	(120)	(78)
Change in:
Trade receivables	(69)	(142)
Inventories	(101)	(52)
Other current assets	(39)	(30)
Accounts payable	80	15
Accrued expenses	105	45
Income tax receivable/payable	30	28
Net cash from (used in) operating activities	210	(27)
Cash flows from investing activities
Purchases of treasury bills	(7,662)	(10,654)
Proceeds from the maturity of treasury bills	9,750	10,750
Purchase of intangible asset	(150)	0
Purchase of property and equipment	(84)	(29)
Net cash from investing activities	1,854	67
Cash flows used in financing activities
Payments on financing lease	(4)	0
Payment of contingent earn-out	0	(150)
Net cash used in financing activities	(4)	(150)
Net increase (decrease) in cash and cash equivalents	2,060	(110)
Cash and cash equivalents, beginning	1,057	963
Cash and cash equivalents, ending	3,117	853
Supplemental cash flow information
Cash paid for income taxes	1	0
Cash paid for interest	$ 1	$ 0