Statements Of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Cash flows from (used in) operating activities
Net income (loss)	$ (245)	$ 139
Adjustments to reconcile net income (loss) to net cash from (used in) operating activities:
Depreciation and amortization	158	156
Deferred income taxes	(3)	(66)
Stock-based compensation expense	6	35
Change in contingent earn-out fair value	0	(53)
Other	(43)	(7)
Change in:
Trade receivables	79	(562)
Inventories	(88)	37
Other current assets	16	54
Accounts payable	(25)	(25)
Accrued expenses	84	148
Income tax receivable	(19)	183
Net cash from (used in) operating activities	(80)	39
Cash flows from investing activities
Purchases of treasury bills	(6,697)	(3,972)
Proceeds from the maturity of treasury bills	6,750	4,000
Purchase of property and equipment	(28)	(12)
Net cash from investing activities	25	16
Cash flows used in financing activities
Payment of contingent earn-out	(150)	0
Net cash used in financing activities	(150)	0
Net increase (decrease) in cash and cash equivalents	(205)	55
Cash and cash equivalents, beginning	963	840
Cash and cash equivalents, ending	758	895
Supplemental cash flow information
Cash paid for income taxes	$ 0	$ 0