Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
CASH FLOWS FROM OPERATING ACTIVITIES
Net earnings	$ 1,657	$ 1,828
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation and amortization	451	575
Provision for excess and obsolete inventory	184	232
Foreign exchange (gain) loss	(7)	21
Amortization of deferred compensation related to stock-based awards	222	91
Loss on sale of property and equipment	3	13
Proceeds from sale of demonstration equipment, net of gain	128	208
Deferred income tax expense	141	169
Changes in assets and liabilities:
Trade accounts receivable	(2,252)	(553)
Inventories	(57)	(282)
Prepaid expenses and other current assets	183	67
Restricted certificates of deposit	125
Accounts payable	343	312
Accrued wages and benefits	47	101
Accrued rent	(100)	(10)
Accrued professional fees	64	(11)
Accrued sales commissions	74	26
Domestic and foreign income taxes payable	523	(10)
Other current liabilities	12	142
Net cash provided by operating activities	1,741	2,919
CASH FLOWS FROM INVESTING ACTIVITIES
Purchase of property and equipment	(282)	(545)
Net cash used in investing activities	(282)	(545)
CASH FLOWS FROM FINANCING ACTIVITIES
Repurchases of common stock	(841)
Net cash used in financing activities	(841)
Effects of exchange rates on cash	17	(117)
Net cash provided by all activities	635	2,257
Cash and cash equivalents at beginning of period	25,710	23,126
Cash and cash equivalents at end of period	26,345	25,383
Cash payments for:
Domestic and foreign income taxes	$ 25	$ 749