Notes and lines of credit consist of the following: (Details) - USD ($) $ in Thousands					1 Months Ended		3 Months Ended
		Mar. 01, 2024	Nov. 13, 2023	Jan. 28, 2022	Dec. 21, 2021	Jul. 31, 2014	Mar. 31, 2024	Dec. 31, 2023	Jan. 27, 2022
Libertyville Bank and Trust [Member]
Line of Credit Facility [Line Items]
Rate	[1]						9.50%
Available	[1]						$ 30	$ 30
Outstanding Balance	[1]
Libertyville Bank and Trust One [Member]
Line of Credit Facility [Line Items]
Rate	[2]						9.50%
Available	[2]						$ 500	500
Outstanding Balance	[2]
Beachcorp, LLC [Member]
Line of Credit Facility [Line Items]
Rate	[3]						9.25%
Available	[3]						$ 5,415	3,298
Outstanding Balance	[3]						$ 850	2,810
Beachcorp, LLC One [Member]
Line of Credit Facility [Line Items]
Rate	[4]						9.25%
Available	[4]						$ 5,200	5,200
Outstanding Balance	[4]						$ 5,200	5,000
Strandler, LLC [Member]
Line of Credit Facility [Line Items]
Rate	[5]						9.25%
Available	[5]						$ 1,000	1,000
Outstanding Balance	[5]						$ 1,000	1,000
Strandler LLC One [Member]
Line of Credit Facility [Line Items]
Rate	[6]						9.25%
Available	[6]							2,000
Outstanding Balance	[6]							$ 2,000
Letter of Credit [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity						$ 30
Debt Instrument, Description of Variable Rate Basis					prime rate	prime rate
Debt Instrument, Basis Spread on Variable Rate					1.00%	1.00%
Line of Credit Facility, Expiration Date					Dec. 22, 2024
Revolving Credit Facility [Member] | Business Loan Agreement [Member] | Beachcorp, LLC [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity				$ 8,000					$ 6,000
Debt Instrument, Description of Variable Rate Basis				prime rate
Debt Instrument, Basis Spread on Variable Rate				0.75%
Line of Credit Facility, Expiration Date		Oct. 01, 2025		Mar. 31, 2024
Inventory Facility [Member] | Business Loan Agreement [Member] | Beachcorp, LLC [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity				$ 4,000
Debt Instrument, Description of Variable Rate Basis				prime rate
Debt Instrument, Basis Spread on Variable Rate				0.75%
Line of Credit Facility, Expiration Date				Mar. 31, 2024
Line of Credit Percentage of Eligible inventory				50.00%
Replacement Promissory Note [Member] | Business Loan Agreement [Member] | Beachcorp, LLC [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity			$ 5,200
Debt Instrument, Description of Variable Rate Basis			prime rate
Debt Instrument, Basis Spread on Variable Rate			0.75%
Line of Credit Facility, Expiration Date		Oct. 01, 2025
Line of Credit Percentage of Eligible inventory			55.00%
Term Loan [Member] | Strandler, LLC [Member]
Line of Credit Facility [Line Items]
Debt Instrument, Description of Variable Rate Basis				prime rate
Debt Instrument, Basis Spread on Variable Rate				0.75%
Line of Credit Facility, Expiration Date		Oct. 01, 2025
Bridge Note [Member] | Strandler, LLC [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity			$ 2,000
Debt Instrument, Description of Variable Rate Basis			prime rate
Debt Instrument, Basis Spread on Variable Rate			0.75%
Line of Credit Facility, Expiration Date			May 13, 2024

[1] Since July 2014, we have maintained a bank-issued letter of credit for up to $30 in borrowings, with interest at the prime rate plus 1%, to support our obligations under our Romeoville, Illinois facility lease agreement. No borrowings have been incurred under this promissory note. It is our intention to renew this note annually. Because there were no amounts outstanding on the note at any time during 2023 or 2022, we have recorded no related liability on our balance sheet.

[2] On December 21, 2021, the existing credit agreement with Libertyville was converted for use to support our obligations under our newly leased manufacturing and warehouse space in Bolingbrook, Illinois. Interest on drawn balances will be at the prime rate plus 1%. This credit agreement has a maturity of December 22, 2024. We expect to renew this agreement annually, as the lease requires. This credit agreement is secured by all the unencumbered assets of the Company and has superior collateral rights to those credit facilities with Beachcorp, LLC and Strandler, LLC.

[3] On January 28, 2022 the Company entered into an Amended and Restated Business Loan Agreement (the “A&R Loan Agreement”), which amends and restates the Master Agreement between the Company and Beachcorp, LLC, and a new promissory note in order to evidence the A/R Revolver facility, including an amendment to expand the limit on the A/R Revolver Facility from $6,000 to $8,000, reduce the interest rate to the prime rate plus 0.75%, and extend the maturity of the A/R Revolver Facility to March 31, 2024. On March 1, 2024 the company entered into a Second Amendment to the Amended and Restated Business Loan Agreement extending the maturity of the A/R Revolver Facility to October 1, 2025.

[4] On January 28, 2022 the Company entered into the A&R Loan Agreement and a new revolving loan agreement (“Inventory Facility”) with Beachcorp, LLC, and a new promissory note in order to evidence the Inventory Facility. The maximum borrowing amount under the Inventory Facility is $4,000, with a borrowing base consisting of up to 50% of the value of qualified inventory of the Company. The interest rate for the Inventory Revolver is at the prime rate plus 0.75%, and it matures on March 31, 2024. On November 13, 2023 the Company entered into a Replacement Promissory Note with Beachcorp, LLC replacing the Inventory Facility promissory note executed on January 28, 2022. The maximum borrowing amount under the replacement Inventory Facility was increased to $5,200, with a borrowing base consisting of up to 55% of the value of qualified inventory of the Company. The interest rate for the replacement Inventory Revolver remains at the prime rate plus 0.75%. On March 1, 2024 the company entered into a Second Amendment to the Business Loan Agreement extending the maturity of the Inventory Revolver Facility to October 1, 2025.

[5] On January 28, 2022 the Company entered into an additional Business Loan Agreement (the “New Term Loan Agreement”) with Strandler, LLC, which effectively transferred or assigned the Term Loan to Strandler, LLC from Beachcorp, LLC. Interest on the New Term Loan is at the prime rate plus 0.75%. Strandler, LLC is also an affiliate of Bradford T. Whitmore. On March 1, 2024 the company entered into a Second Amendment to the Business Loan Agreement extending the maturity of the Term Maturity Note to October 1, 2025.

[6] On November 13, 2023 the Company entered into a new Promissory Note (“Bridge Note”) with Strandler, LLC. The maximum borrowing amount under the Bridge Note is $2,000. The interest rate for the Bridge Note is at the prime rate plus 0.75%, and it matures on May 13, 2024. The Bridge Note was repaid in February 2024.