Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
CASH FLOWS FROM OPERATING ACTIVITIES
Net earnings (loss)	$ 6,996	$ (515)
Adjustments to reconcile net earnings (loss) to net cash provided by operating activities:
Depreciation and amortization	2,166	2,378
Provision for excess and obsolete inventory	154	410
Foreign exchange loss	36	33
Amortization of deferred compensation related to stock-based awards	1,094	480
Loss on disposal of property and equipment	20	56
Deferred income tax benefit	(221)	(81)
Changes in assets and liabilities:
Trade accounts receivable	(3,874)	(237)
Inventories	(2,051)	(146)
Prepaid expenses and other current assets	(26)	95
Restricted certificates of deposit	40	0
Other assets	(10)	(5)
Accounts payable	1,425	215
Accrued wages and benefits	942	18
Accrued professional fees	52	47
Customer deposits and deferred revenue	1,697	936
Accrued sales commissions	366	(2)
Operating lease liabilities	(918)	(977)
Domestic and foreign income taxes payable	302	(240)
Other current liabilities	(60)	(60)
Other liabilities	(7)	(5)
Net cash provided by operating activities	8,123	2,400
CASH FLOWS FROM INVESTING ACTIVITIES
Purchase of property and equipment	(577)	(520)
Net cash used in investing activities	(577)	(520)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from stock options exercised	1,019	0
Repurchases of common stock	0	(74)
Proceeds from Paycheck Protection Program loans	0	2,829
Repayments of Paycheck Protection Program loans	0	(2,829)
Proceeds from revolving credit facility	0	2,800
Repayments of revolving credit facility	0	(2,800)
Net cash provided by (used in) financing activities	1,019	(74)
Effects of exchange rates on cash	(99)	55
Net cash provided by all activities	8,466	1,861
Cash and cash equivalents at beginning of period	10,277	7,612
Cash and cash equivalents at end of period	18,743	9,473
Cash payments for:
Domestic and foreign income taxes	$ 1,053	$ 58