Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013
CASH FLOWS FROM OPERATING ACTIVITIES
Net earnings	$ 3,439us-gaap_NetIncomeLoss	$ 3,077us-gaap_NetIncomeLoss
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation and amortization	879	847
Provision for excess and obsolete inventory	344us-gaap_InventoryWriteDown	311us-gaap_InventoryWriteDown
Foreign exchange loss	44	4
Amortization of deferred compensation related to restricted stock	134	128
(Gain) loss on sale of property and equipment	44	(3)
Proceeds from sale of demonstration equipment, net of gain	161	32
Deferred income tax expense	318us-gaap_DeferredIncomeTaxExpenseBenefit	307us-gaap_DeferredIncomeTaxExpenseBenefit
Changes in assets and liabilities:
Trade accounts receivable	610	(233)
Inventories	(893)us-gaap_IncreaseDecreaseInInventories	(416)us-gaap_IncreaseDecreaseInInventories
Prepaid expenses and other current assets	(113)	(6)
Restricted certificates of deposit	100
Other assets	(17)	(18)
Accounts payable	172	23
Accrued wages and benefits	(75)	63
Accrued rent	38	48
Accrued professional fees	25	(19)
Accrued sales commissions	23	(43)
Domestic and foreign income taxes payable	(61)
Other current liabilities	(43)	(332)
Net cash provided by operating activities	5,129	3,770
CASH FLOWS FROM INVESTING ACTIVITIES
Purchase of property and equipment	(831)	(424)
Proceeds from sale of property and equipment	8	10
Net cash used in investing activitites	(823)	(414)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from stock options exercised		30
Net cash provided by financing activities		30
Effects of exchange rates on cash	(198)	56
Net cash provided by all activities	4,108	3,442
Cash and cash equivalents at beginning of period	19,018	15,576
Cash and cash equivalents at end of period	23,126	19,018
Cash payments for:
Domestic and foreign income taxes	1,213us-gaap_IncomeTaxesPaid	623us-gaap_IncomeTaxesPaid
SUPPLEMENTAL DISCLOSURE OF NON-CASH INVESTING AND FINANCING ACTIVITIES:
Issuance of non-vested shares of restricted stock	41	462
Forfeiture of non-vested shares of restricted stock	$ (20)

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