Statements Of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Cash flows from (used in) operating activities
Net loss	$ (84)	$ (89)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	78	79
Deferred income taxes	(35)	(15)
Stock-based compensation expense	17	29
Other	(8)	(11)
Change in:
Trade receivables	(57)	(118)
Inventories	(35)	69
Current assets, other	(2)	3
Accounts payable	(97)	19
Accrued expenses	66	0
Income tax receivable/accrued income taxes	(14)	(36)
Net cash used in operating activities	(171)	(70)
Cash flows from (used in) investing activities
Purchases of treasury bills	(1,987)	(1,447)
Proceeds from the maturity of treasury bills	2,000	1,843
Purchase of property and equipment	(12)	0
Net cash from investing activities	1	396
Cash flows used in financing activities
Payments on long-term debt	0	(390)
Net cash used in financing activities	0	(390)
Net decrease in cash and cash equivalents	(170)	(64)
Cash and cash equivalents, beginning	840	569
Cash and cash equivalents, ending	670	505
Supplemental cash flow information
Cash paid for income taxes	1	5
Cash paid for interest	$ 0	$ 10