Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
CASH FLOWS FROM OPERATING ACTIVITIES
Net earnings	$ 975	$ 2,658
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation and amortization	1,779	599
Adjustment to earnout payable	5,355
Adjustment to contingent consideration liability	1,621
Provision for excess and obsolete inventory	251	226
Foreign exchange (gain) loss	(146)	16
Amortization of deferred compensation related to stock-based awards	344	269
Proceeds from sale of demonstration equipment, net of gain	152	129
Deferred income tax (benefit) expense	(1,630)	135
Changes in assets and liabilities:
Trade accounts receivable	(2,983)	(1,009)
Inventories	388	(384)
Prepaid expenses and other current assets	(31)	295
Restricted certificates of deposit		175
Other assets	2	178
Accounts payable	(756)	459
Accrued wages and benefits	512	126
Accrued rent	(51)	(85)
Accrued professional fees	210	57
Accrued sales commissions	137	(10)
Customer deposits and deferred revenue	55	(118)
Domestic and foreign income taxes payable	586	549
Other current liabilities	36	23
Federal transition tax payable	436
Net cash provided by operating activities	7,242	4,288
CASH FLOWS FROM INVESTING ACTIVITIES
Acquisition of business, net of cash acquired	(21,962)
Purchase of property and equipment	(745)	(339)
Proceeds from sale of property and equipment	36
Net cash used in investing activities	(22,671)	(339)
CASH FLOWS FROM FINANCING ACTIVITIES
Repurchases of common stock	(62)	(978)
Net cash used in financing activities	(62)	(978)
Effects of exchange rates on cash	170	(70)
Net cash provided by (used in) all activities	(15,321)	2,901
Cash and cash equivalents at beginning of period	28,611	25,710
Cash and cash equivalents at end of period	13,290	28,611
Cash payments for:
Domestic and foreign income taxes	3,467	635
Goodwill resulting from acquisition	12,032
Net cash paid for acquisition	21,962
SUPPLEMENTAL DISCLOSURE OF NON-CASH INVESTING AND FINANCING ACTIVITIES:
Issuance of unvested shares of restricted stock	432	369
Forfeiture of unvested shares of restricted stock	(104)
Ambrell [Member]
CASH FLOWS FROM INVESTING ACTIVITIES
Acquisition of business, net of cash acquired	(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