Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
CASH FLOWS FROM OPERATING ACTIVITIES
Net earnings (loss)	$ (973)	$ 951
Adjustments to reconcile net earnings (loss) to net cash provided by (used in) operating activities:
Depreciation and amortization	1,584	1,598
Payment of earnout for 2018 related to Ambrell acquisition		(12,167)
Provision for excess and obsolete inventory	305	243
Foreign exchange loss	37	17
Amortization of deferred compensation related to stock-based awards	395	396
Loss on disposal of property and equipment		17
Proceeds from sale of demonstration equipment, net of gain		59
Deferred income tax benefit	(209)	(189)
Changes in assets and liabilities:
Trade accounts receivable	(205)	1,364
Inventories	(1,054)	(908)
Prepaid expenses and other current assets	359	132
Restricted certificates of deposit		35
Other assets	(4)	(1)
Accounts payable	635	626
Accrued wages and benefits	(133)	(941)
Accrued professional fees	(63)	104
Customer deposits and deferred revenue	217	(542)
Accrued sales commissions	41	(189)
Operating lease liabilities	(652)	(668)
Domestic and foreign income taxes payable	(100)	5
Other current liabilities	(94)	(156)
Other liabilities	(5)	263
Net cash provided by (used in) operating activities	81	(9,951)
CASH FLOWS FROM INVESTING ACTIVITIES
Purchase of property and equipment	(190)	(298)
Net cash used in investing activities	(190)	(298)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from Paycheck Protection Program loans	2,829
Repayments of Paycheck Protection Program loans	(2,829)
Proceeds from revolving credit facility	2,800
Repayments of revolving credit facility	(2,800)
Repurchases of common stock	(74)
Net cash used in financing activities	(74)
Effects of exchange rates on cash	(5)	(18)
Net cash used in all activities	(188)	(10,267)
Cash and cash equivalents at beginning of period	7,612	17,861
Cash and cash equivalents at end of period	7,424	7,594
Cash payments for:
Domestic and foreign income taxes	$ 73	$ 396