Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Cash flows from operating activities:
Net income	$ 364	$ 606
Adjustments to reconcile net income from continuing operations to net cash provided by operating activities:
Depreciation and amortization	40	28
Stock based compensation	29	25
Changes in operating assets and liabilities:
Accounts receivable	90	(199)
Inventories	(83)	(168)
Prepaid expenses and other current assets	56	79
Other assets	(2)	(31)
Accounts payable	(85)	(83)
Accrued liabilities	(21)	(58)
Accrued income taxes	37
Deferred income taxes	45
Deferred revenue	(82)	(14)
Net cash provided by operating activities	388	185
Cash flows from investing activities:
Property, plant and equipment	(16)	(9)
Intangibles	(19)
Net cash used in investing activities	(35)	(9)
Effect of exchange rate changes on cash and cash equivalents	11	4
Net increase in cash and cash equivalents	364	180
Cash and cash equivalents, beginning of period	6,009	4,430
Cash and cash equivalents, end of period	6,373	4,610
Supplemental disclosure of cash flow information:
Income taxes paid	$ 105	$ (15)