Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Cash flows related to operating activities:
Income (loss) from continuing operations	$ 145,000	$ (366,000)
Adjustments to reconcile income (loss) from continuing operations to net cash (used) provided by operating activities:
Depreciation and amortization	218,000	271,000
Stock based compensation	46,000	63,000
(Decrease) increase allowance for credit losses	(3,000)	3,000
(Decrease) increase inventory reserve	(6,000)	38,000
Increase (decrease) warranty reserve	4,000	(59,000)
Changes in assets and liabilities (using) providing cash:
Accounts receivable	(2,071,000)	1,589,000
Inventories	344,000	(769,000)
Prepaid and other current assets	(174,000)	(412,000)
Accounts payable	324,000	77,000
Accrued employee compensation and benefit costs	89,000	(164,000)
Other accrued liabilities	(378,000)	118,000
Post-retirement obligations	41,000	24,000
Other long-term liabilities	(168,000)	0
Net cash (used) provided by operating activities from continuing operations	(1,589,000)	413,000
Cash flows related to investing activities:
Purchase of property, plant and equipment	(69,000)	(152,000)
Disposal of property, plant and equipment	17,000	0
Net cash used by investing activities from continuing operations	(52,000)	(152,000)
Cash flows related to financing activities:
Proceeds from (payments on) line of credit, net	1,598,000	(94,000)
Net cash provided (used) by financing activities from continuing operations	1,598,000	(94,000)
Discontinued Operation
Cash used by operating activities	(31,000)	(126,000)
Net cash used by discontinued operation	(31,000)	(126,000)
Net (decrease) increase in cash and restricted cash	(74,000)	41,000
Cash and restricted cash at beginning of period	261,000	245,000
Cash and restricted cash at end of period	$ 187,000	$ 286,000