Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
CASH FLOWS FROM OPERATING ACTIVITIES
Net earnings (loss)	$ (1,143)	$ 1,138
Adjustments to reconcile net earnings (loss) to net cash used in operating activities:
Depreciation and amortization	791	804
Payment of earnout for 2018 related to Ambrell acquisition		(10,048)
Provision for excess and obsolete inventory	171	107
Foreign exchange loss	38	4
Amortization of deferred compensation related to stock-based awards	187	183
Loss on disposal of property and equipment		9
Proceeds from sale of demonstration equipment, net of gain		43
Deferred income tax benefit	(93)	(89)
Changes in assets and liabilities:
Trade accounts receivable	1,188	374
Inventories	(714)	(737)
Prepaid expenses and other current assets	117	(88)
Other assets	(4)	(6)
Accounts payable	316	721
Accrued wages and benefits	(543)	(1,192)
Accrued professional fees	(105)	182
Customer deposits and deferred revenue	152	(442)
Accrued sales commissions	78	(182)
Operating lease liabilities	(323)	(341)
Domestic and foreign income taxes payable	(207)	258
Other current liabilities	(25)	(173)
Net cash used in operating activities	(119)	(9,475)
CASH FLOWS FROM INVESTING ACTIVITIES
Purchase of property and equipment	(80)	(141)
Net cash used in investing activities	(80)	(141)
CASH FLOWS FROM FINANCING ACTIVITIES
Repurchases of common stock	(74)
Net cash used in financing activities	(74)
Effects of exchange rates on cash	(21)	(54)
Net cash used in all activities	(294)	(9,670)
Cash and cash equivalents at beginning of period	7,612	17,861
Cash and cash equivalents at end of period	7,318	8,191
Cash payments for:
Domestic and foreign income taxes	$ 50	$ 1,168