Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
CASH FLOWS FROM OPERATING ACTIVITIES
Net earnings	$ 5,541	$ 1,657
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation and amortization	1,317	451
Adjustment to contingent consideration liability	(549)
Provision for excess and obsolete inventory	161	184
Foreign exchange gain	(130)	(7)
Amortization of deferred compensation related to stock-based awards	292	222
(Gain) loss on sale of property and equipment	(4)	3
Proceeds from sale of demonstration equipment, net of gain	53	128
Deferred income tax expense (benefit)	(225)	141
Changes in assets and liabilities:
Trade accounts receivable	(1,060)	(2,252)
Inventories	(581)	(57)
Prepaid expenses and other current assets	(164)	183
Restricted certificates of deposit		125
Other assets	1
Accounts payable	(426)	343
Accrued wages and benefits	(18)	47
Accrued rent	(42)	(100)
Accrued professional fees	177	64
Accrued sales commissions	83	74
Customer deposits and deferred revenue	302	(74)
Domestic and foreign income taxes payable	472	523
Other current liabilities	(12)	86
Net cash provided by operating activities	5,188	1,741
CASH FLOWS FROM INVESTING ACTIVITIES
Acquisition of business, net of cash acqured	(21,962)
Purchase of property and equipment	(435)	(282)
Proceeds from sale of property and equipment	35
Net cash used in investing activities	(22,362)	(282)
CASH FLOWS FROM FINANCING ACTIVITIES
Repurchases of common stock	(62)	(841)
Net cash used in financing activities	(62)	(841)
Effects of exchange rates on cash	124	17
Net cash provided by (used in) all activities	(17,112)	635
Cash and cash equivalents at beginning of period	28,611	25,710
Cash and cash equivalents at end of period	11,499	26,345
Cash payments for:
Domestic and foreign income taxes	2,555	25
Goodwill resulting from acquisition	12,032
Net cash paid for acquisition	21,962
Ambrell [Member]
CASH FLOWS FROM INVESTING ACTIVITIES
Acquisition of business, net of cash acqured	(21,962)
Cash payments for:
Fair value of assets acquired, net of cash	22,652
Liabilities assumed	(8,599)
Goodwill resulting from acquisition	12,032
Contingent consideration	(4,123)
Net cash paid for acquisition	$ 21,962