Condensed Consolidated Statements of Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Revenue
Product sales	$ 13,116	$ 10,702	$ 23,868	$ 18,944
Barrier rentals	1,357	700	2,250	1,819
Royalty income	869	594	1,445	1,005
Shipping and installation revenue	4,297	2,702	8,831	5,772
Total revenue	19,639	14,698	36,394	27,540
Cost of sales	14,506	12,912	27,349	23,588
Gross profit	5,133	1,786	9,045	3,952
Operating expenses
General and administrative expenses	1,669	1,884	3,218	3,233
Selling expenses	791	883	1,645	1,645
Total operating expenses	2,460	2,767	4,863	4,878
Operating income (loss)	2,673	(981)	4,182	(926)
Other income (expense)
Interest expense	(59)	(64)	(119)	(128)
Interest income	7	5	15	10
Gain on sale of assets	0	116	3	199
Other income (expense)	(8)	32	36	57
Total other income (expense)	(60)	89	(65)	138
Income (loss) before income tax expense (benefit)	2,613	(892)	4,117	(788)
Income tax expense (benefit)	632	(110)	988	(87)
Net income (loss)	$ 1,981	$ (782)	$ 3,129	$ (701)
Basic and diluted earnings (loss) per common share	$ 0.37	$ (0.15)	$ 0.59	$ (0.13)
Weighted average number of common shares outstanding:
Basic	5,322	5,256	5,315	5,256
Diluted	5,323	5,256	5,316	5,256