Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
CASH FLOWS FROM OPERATING ACTIVITIES
Net earnings (loss)	$ (515)	$ 1,598
Adjustments to reconcile net earnings (loss) to net cash provided by (used in) operating activities:
Depreciation and amortization	2,378	2,431
Payment of earnout for 2018 related to Ambrell acquisition		(12,167)
Provision for excess and obsolete inventory	410	341
Foreign exchange loss	33	37
Amortization of deferred compensation related to stock-based awards	480	638
Loss on disposal of property and equipment	2	17
Proceeds from sale of demonstration equipment, net of gain	54	138
Deferred income tax benefit	(81)	(307)
Changes in assets and liabilities:
Trade accounts receivable	(237)	1,254
Inventories	(146)	(1,551)
Prepaid expenses and other current assets	95	(235)
Restricted certificates of deposit		35
Other assets	(5)
Accounts payable	215	943
Accrued wages and benefits	18	(969)
Accrued professional fees	47	192
Customer deposits and deferred revenue	936	(509)
Accrued sales commissions	(2)	(257)
Operating lease liabilities	(977)	(1,059)
Domestic and foreign income taxes payable	(240)	171
Other current liabilities	(60)	(135)
Other liabilities	(5)	263
Net cash provided by (used in) operating activities	2,400	(9,131)
CASH FLOWS FROM INVESTING ACTIVITIES
Purchase of property and equipment	(520)	(413)
Net cash used in investing activities	(520)	(413)
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)	(179)
Net cash used in financing activities	(74)	(179)
Effects of exchange rates on cash	55	(113)
Net cash provided by (used in) all activities	1,861	(9,836)
Cash and cash equivalents at beginning of period	7,612	17,861
Cash and cash equivalents at end of period	9,473	8,025
Cash payments for:
Domestic and foreign income taxes	$ 58	$ 488