Statements Of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Cash flows from (used in) operating activities
Net income	$ 202	$ 1,214
Adjustments to reconcile net income to net cash from (used in) operating activities:
Depreciation and amortization	313	348
Realized gain on sale of available-for-sale securities	0	(1,449)
Deferred income taxes	(18)	(104)
Change in contingent earn-out fair value	(260)	(17)
Stock-based compensation expense	74	63
Other	(20)	(1)
Change in:
Trade receivables	(81)	51
Inventories	49	(340)
Current assets, other	(4)	(7)
Accounts payable	103	10
Accrued expenses	(92)	4
Accrued income taxes	(70)	(78)
Net cash from (used in) operating activities	196	(306)
Cash flows from (used in) investing activities
Proceeds from sale of available-for-sale securities	0	1,467
Purchases of treasury bills	(8,866)	(12,674)
Proceeds from the maturity of treasury bills	9,339	11,343
Purchase of property and equipment	(8)	(70)
Net cash from investing activities	465	66
Cash flows used in financing activities
Payments on long-term debt	(390)	(381)
Net cash used in financing activities	(390)	(381)
Net increase (decrease) in cash and cash equivalents	271	(621)
Cash and cash equivalents, beginning	569	1,190
Cash and cash equivalents, ending	840	569
Supplemental cash flow information
Cash paid during the year for income taxes	90	712
Cash paid during the year for interest	$ 10	$ 19