Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
CASH FLOWS FROM OPERATING ACTIVITIES
Net earnings	$ 577	$ 2,212
Adjustments to reconcile net earnings to net cash used in operating activities:
Depreciation and amortization	1,279	740
Provision for excess and obsolete inventory	123	39
Foreign exchange loss	40	8
Amortization of deferred compensation related to stock-based awards	372	269
Loss on disposal of property and equipment	0	22
Proceeds from sale of demonstration equipment, net of gain	19	7
Deferred income tax benefit	(438)	(9)
Changes in assets and liabilities:
Trade accounts receivable	(832)	(5,082)
Inventories	(2,177)	(783)
Prepaid expenses and other current assets	(374)	212
Other assets	(8)	(8)
Accounts payable	1,592	1,235
Accrued wages and benefits	(1,179)	103
Accrued professional fees	(520)	(261)
Customer deposits and deferred revenue	(608)	799
Accrued sales commissions	(20)	232
Operating lease liabilities	(346)	(343)
Domestic and foreign income taxes payable	(395)	335
Other current liabilities	40	(57)
Other liabilities	60	(7)
Net cash used in operating activities	(2,795)	(337)
CASH FLOWS FROM INVESTING ACTIVITIES
Purchase of property and equipment	(335)	(388)
Net cash used in investing activities	(335)	(388)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from shares sold under Employee Stock Purchase Plan	56	0
Proceeds from stock options exercised	0	717
Net cash provided by (used in) financing activities	(827)	717
Effects of exchange rates on cash	(27)	(74)
Net cash used in all activities	(3,984)	(82)
Cash and cash equivalents at beginning of period	21,195	10,277
Cash and cash equivalents at end of period	17,211	10,195
Cash payments for:
Domestic and foreign income taxes	966	41
SUPPLEMENTAL DISCLOSURE OF NON-CASH INVESTING ACTIVITIES:
Increase in liability for contingent consideration	500
Increase in fair value of intangible assets	(49)
Increase in goodwill	(451)
Term Note [Member]
CASH FLOWS FROM FINANCING ACTIVITIES
Repayments of Term Note	$ (883)	$ 0