Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
CASH FLOWS FROM OPERATING ACTIVITIES
Net earnings	$ 951	$ 4,395
Adjustments to reconcile net earnings to net cash provided by (used in) operating activities:
Depreciation and amortization	1,598	840
Payment of earnout related to Ambrell acquisition	(12,167)	(1,710)
Adjustment to earnout payable		1,016
Provision for excess and obsolete inventory	243	129
Foreign exchange (gain) loss	17	(49)
Amortization of deferred compensation related to stock-based awards	396	292
Loss on disposal of property and equipment	17	11
Proceeds from sale of demonstration equipment, net of gain	59	99
Deferred income tax benefit	(189)	(142)
Changes in assets and liabilities:
Trade accounts receivable	1,364	606
Inventories	(908)	(2,025)
Prepaid expenses and other current assets	132	143
Restricted certificates of deposit	35
Other assets	(1)	(4)
Accounts payable	626	707
Accrued wages and benefits	(941)	(488)
Accrued professional fees	104	59
Customer deposits and deferred revenue	(542)	(153)
Accrued sales commission	(189)	13
Operating lease liabilities	(668)
Domestic and foreign income taxes payable	5	86
Contingent liability for repayment of state and local grant funds received	263
Long-term portion of Federal transition tax payable		(436)
Other current liabilities	(156)	114
Net cash provided by (used in) operating activities	(9,951)	3,503
CASH FLOWS FROM INVESTING ACTIVITIES
Purchase of property and equipment	(298)	(1,920)
Net cash used in investing activities	(298)	(1,920)
CASH FLOWS FROM FINANCING ACTIVITIES
Payment of earnout related to Ambrell acquisition		(4,123)
Net cash used in financing activities		(4,123)
Effects of exchange rates on cash	(18)	(37)
Net cash used in all activities	(10,267)	(2,577)
Cash and cash equivalents at beginning of period	17,861	13,290
Cash and cash equivalents at end of period	7,594	10,713
Cash payments for:
Domestic and foreign income taxes	$ 396	$ 1,425