Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended
Mar. 31, 2015	Mar. 31, 2014
CASH FLOWS FROM OPERATING ACTIVITIES
Net earnings	$ 438us-gaap_NetIncomeLoss	$ 286us-gaap_NetIncomeLoss
Adjustments to reconcile net earnings to net cash provided by (used in) operating activities:
Depreciation and amortization	200	217
Provision for excess and obsolete inventory	51us-gaap_InventoryWriteDown	35us-gaap_InventoryWriteDown
Foreign exchange (gain) loss	19	(1)
Amortization of deferred compensation related to restricted stock	30	41
Proceeds from sale of demonstration equipment, net of gain	16	8
Deferred income tax expense (benefit)	(8)us-gaap_DeferredIncomeTaxExpenseBenefit	20us-gaap_DeferredIncomeTaxExpenseBenefit
Changes in assets and liabilities:
Trade accounts receivable	(1,484)	(142)
Inventories	(475)us-gaap_IncreaseDecreaseInInventories	(595)us-gaap_IncreaseDecreaseInInventories
Prepaid expenses and other current assets	50	46
Other assets	(7)	(8)
Accounts payable	676	497
Accrued wages and benefits	(170)	(407)
Accrued rent	(19)	18
Accrued professional fees	142	(38)
Accrued sales commissions	40	(2)
Domestic and foreign income taxes payable	117	(29)
Other current liabilities	121	83
Net cash provided by (used in) operating activities	(263)	29
CASH FLOWS FROM INVESTING ACTIVITIES
Purchase of property and equipment	(179)	(200)
Net cash used in investing activities	(179)	(200)
Effects of exchange rates on cash	(199)	6
Net cash used in all activities	(641)	(165)
Cash and cash equivalents at beginning of period	23,126	19,018
Cash and cash equivalents at end of period	22,485	18,853
Cash payments for:
Domestic and foreign income taxes	124us-gaap_IncomeTaxesPaid	134us-gaap_IncomeTaxesPaid
SUPPLEMENTAL DISCLOSURE OF NON-CASH INVESTING AND FINANCING ACTIVITIES:
Forfeiture of non-vested shares of restricted stock		$ 20

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