Consolidated Statements of Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Revenue
Product sales	$ 27,821	$ 28,500
Barrier rentals	6,545	9,925
Royalty income	2,498	2,216
Shipping and installation revenue	13,267	10,001
Total revenue	50,131	50,642
Cost of goods sold	40,662	36,222
Gross profit	9,469	14,420
General and administrative expenses	5,551	5,416
Selling expenses	3,064	2,836
Total operating expenses	8,615	8,252
Operating income	854	6,168
Other income (expense)
Interest expense	(260)	(190)
Interest income	14	35
Gain on sale of assets	109	317
Gain on forgiveness of PPP loan	0	2,692
Other income	228	72
Total other income (expense), net	91	2,926
Income before income tax expense	945	9,094
Income tax expense	145	1,524
Net income	$ 800	$ 7,570
Basic and diluted earnings per share	$ 0.15	$ 1.45