Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 765	$ 681
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation and amortization	482	505
Compensation on stock-based awards	80	99
Change in inventory reserves	76	32
Change in accounts receivable allowances	(66)	(32)
Other, net	(4)	(15)
Changes in current operating assets and liabilities:
Accounts receivable	3,215	(206)
Inventories	(1,400)	1,075
Contract assets	287	(823)
Prepaid expenses and other current assets	(328)	(600)
Accounts payable	(8)	(1,799)
Accrued payroll and commissions	640	1,244
Customer deposits	(926)	1,315
Other accrued liabilities	15	242
Net cash provided by operating activities	2,828	1,718
CASH FLOWS FROM INVESTING ACTIVITIES
Proceeds from sale of property and equipment	9	0
Purchases of property and equipment	(744)	(496)
Net cash used in investing activities	(735)	(496)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from line of credit	32,768	31,133
Payments to line of credit	(32,394)	(32,145)
Principal payments on financing leases	(100)	(96)
Stock option exercises	0	35
Net cash provided by (used in) financing activities	274	(1,073)
Effect of exchange rate changes on cash	(14)	3
Net change in cash and cash equivalents	2,353	152
Cash and cash equivalents - beginning of period	1,675	2,481
Cash and cash equivalents - end of period	4,028	2,633
Reconciliation of cash and restricted cash reported within the condensed consolidated balance sheets:
Cash	4,028	1,267
Restricted cash	0	1,366
Total cash and restricted cash reported in the condensed consolidated statements of cash flows	4,028	2,633
Supplemental disclosure of cash flow information:
Cash paid for interest	134	129
Cash paid for income taxes	141	112
Supplemental noncash investing and financing activities:
Property and equipment purchases in accounts payable	16	78
Operating lease assets acquired under operating lease	$ 719	$ 0