Statements Of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Cash flows from operating activities
Net income (loss)	$ (10)	$ 295
Adjustments to reconcile net income (loss) to net cash from operating activities:
Depreciation and amortization	321	308
Deferred income taxes	(16)	(4)
Change in contingent earn-out fair value	0	(45)
Stock-based compensation expense	15	51
Interest accrued on treasury bills	(114)	(37)
Other	0	3
Change in:
Trade receivables	6	(135)
Inventories	(66)	(37)
Other current assets	(14)	33
Accounts payable	(62)	(61)
Accrued expenses	25	76
Income taxes receivable	45	21
Net cash from operating activities	130	468
Cash flows from (used in) investing activities
Purchases of treasury bills	(14,353)	(8,681)
Proceeds from the maturity of treasury bills	14,500	8,450
Purchase of property and equipment	(32)	(114)
Net cash from (used in) investing activities	115	(345)
Cash flows used in financing activities
Payments on financing lease	(1)	0
Payment of contingent earn-out	(150)	0
Net cash used in financing activities	(151)	0
Net increase in cash and cash equivalents	94	123
Cash and cash equivalents, beginning	963	840
Cash and cash equivalents, ending	1,057	963
Supplemental cash flow information
Cash paid during the year for income taxes	1	196
Cash paid during the year for interest	1	0
Supplemental disclosures of non-cash investment and financing activity
Right-of-use assets obtained in exchange for finance lease obligations	$ 30	$ 0