Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
CASH FLOWS FROM OPERATING ACTIVITIES
Net earnings	$ 2,385	$ 1,955
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation and amortization	640	696
Provision for excess and obsolete inventory	264	522
Foreign exchange (gain) loss	6	(10)
Amortization of deferred compensation related to restricted stock	86	93
Profit sharing expense funded through the issuance of treasury stock		150
(Gain) loss on sale of property and equipment	(3)	5
Proceeds from sale of demonstration equipment, net of gain	24	86
Deferred income tax expense (benefit)	(52)	489
Changes in assets and liabilities:
Trade accounts receivable	(1,892)	465
Inventories	(612)	404
Prepaid expenses and other current assets	(23)	(71)
Restricted certificates of deposit		50
Other assets	(1)	14
Accounts payable	465	380
Accrued wages and benefits	(88)	(255)
Accrued sales commissions	54	(50)
Accrued rent	41	101
Accrued professional fees	42	(44)
Deferred revenue and customer deposits	(110)	(239)
Domestic and foreign income taxes payable	249	208
Other current liabilities	(119)	(123)
Net cash provided by operating activities	1,356	4,826
CASH FLOWS FROM INVESTING ACTIVITIES
Acquisition of business		(3,802)
Purchase of property and equipment	(257)	(283)
Proceeds from sale of property and equipment	10	13
Net cash used in investing activities	(247)	(4,072)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from stock options exercised	30
Net cash provided by financing activities	30
Effects of exchange rates on cash	36	(11)
Net cash provided by all activities	1,175	743
Cash and cash equivalents at beginning of period	15,576	13,957
Cash and cash equivalents at end of period	16,751	14,700
Cash payments for:
Domestic and foreign income taxes	389	283
Interest		8
Details of acquisition:
Fair value of assets acquired		4,026
Liabilities assumed		(274)
Goodwill resulting from acquisition		50
Net cash paid for acquisition		3,802
SUPPLEMENTAL DISCLOSURE OF NON-CASH INVESTING AND FINANCING ACTIVITIES:
Issuance of non-vested shares of restricted stock	$ 124