Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
CASH FLOWS FROM OPERATING ACTIVITIES
Net earnings	$ 2,078	$ 81
Adjustments to reconcile net earnings to net cash used in operating activities:
Depreciation and amortization	150	160
Provision for excess and obsolete inventory	47	69
Foreign exchange gain	(12)	(10)
Amortization of deferred compensation related to stock-based awards	88	39
Proceeds from sale of demonstration equipment, net of gain	31	47
Deferred income tax expense (benefit)	(6)	25
Changes in assets and liabilities:
Trade accounts receivable	(4,423)	(907)
Inventories	(291)	7
Prepaid expenses and other current assets	(31)	29
Other assets	(5)	(7)
Accounts payable	465	456
Accrued wages and benefits	(400)	(299)
Accrued rent	(28)	(51)
Accrued professional fees	(11)
Accrued sales commissions	148	19
Domestic and foreign income taxes payable	1,050	23
Other current liabilities	150
Net cash used in operating activities	(1,000)	(319)
CASH FLOWS FROM INVESTING ACTIVITIES
Purchase of property and equipment	(114)	(38)
Net cash used in investing activities	(114)	(38)
CASH FLOWS FROM FINANCING ACTIVITIES
Repurchases of common stock	(62)	(471)
Net cash used in financing activities	(62)	(471)
Effects of exchange rates on cash	20	69
Net cash used in all activities	(1,156)	(759)
Cash and cash equivalents at beginning of period	28,611	25,710
Cash and cash equivalents at end of period	27,455	24,951
Cash payments for:
Domestic and foreign income taxes	$ 39	$ 2