Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
CASH FLOWS FROM OPERATING ACTIVITIES
Net earnings	$ 8,461	$ 7,283
Adjustments to reconcile net earnings to net cash provided by (used in) operating activities:
Depreciation and amortization	4,734	3,145
Provision for excess and obsolete inventory	771	203
Foreign exchange loss	109	34
Amortization of deferred compensation related to stock-based awards	1,787	1,450
Discount on shares sold under Employee Stock Purchase Plan	(36)	(8)
Proceeds from sale of demonstration equipment, net of gain	68	145
Loss on disposal of property and equipment	0	50
Deferred income tax benefit	(1,659)	(489)
Changes in assets and liabilities:
Trade accounts receivable	(4,886)	(4,775)
Inventories	(10,631)	(2,544)
Prepaid expenses and other current assets	(243)	(416)
Restricted certificates of deposit	0	40
Other assets	(2)	(9)
Operating lease liabilities	(1,363)	(1,218)
Accounts payable	2,875	1,177
Accrued wages and benefits	(118)	1,220
Accrued professional fees	(157)	267
Customer deposits and deferred revenue	(1,464)	4,755
Accrued sales commission	621	280
Domestic and foreign income taxes payable	(573)	301
Other current liabilities	184	(59)
Other liabilities	61	(6)
Net cash provided by (used in) operating activities	(1,389)	10,842
CASH FLOWS FROM INVESTING ACTIVITIES
Acquisitions of businesses, net of cash acquired	0	(20,378)
Payment of contingent consideration related to Z-Sciences acquisition	(179)	0
Refund of final working capital adjustment related to Acculogic	371	0
Purchase of property and equipment	(1,365)	(994)
Purchase of short term investments	(3,494)	0
Sales of short term investments	3,494	0
Net cash used in investing activities	(1,173)	(21,372)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from stock options exercised	38	1,582
Proceeds from shares sold under Employee Stock Purchase Plan	197	43
Acquisition of treasury stock-shares surrendered by employees to satisfy tax liability	(10)	0
Net cash provided by (used in) financing activities	(3,733)	21,725
Effects of exchange rates on cash	(324)	(277)
Net cash provided by (used in) all activities	(6,619)	10,918
Cash, cash equivalents and restricted cash at beginning of period	21,195	10,277
Cash, cash equivalents and restricted cash at end of period	14,576	21,195
Cash payments for:
Domestic and foreign income taxes	3,924	1,322
SUPPLEMENTAL DISCLOSURE OF NON-CASH INVESTING AND FINANCING ACTIVITIES:
Issuance of unvested shares of restricted stock	1,138	1,541
Forfeiture of unvested shares of restricted stock	(54)	(164)
Details of acquisitions (Note 3):
Fair value of assets acquired, net of cash	(49)	17,717
Liabilities assumed	0	(3,849)
Contingent consideration	500	(1,109)
Goodwill resulting from acquisitions	(451)	7,619
Net cash paid for acquisitions	0	20,378
Term Note [Member]
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from Term Note	0	20,500
Repayments of Term Note	$ (3,958)	$ (400)