Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
Mar. 31, 2022	Mar. 31, 2021
Net sales	$ 109,331	$ 72,311
Cost of sales	94,545	63,536
Gross profit	14,786	8,775
Selling, general, and administrative expense	9,368	5,830
Operating income	5,418	2,945
Other income	44	59
Interest expense	(560)	(227)
Income before income taxes	4,902	2,777
Income tax expense	1,343	602
Net income	$ 3,559	$ 2,175
us-gaap_EarningsPerShareAbstract
Basic (in dollars per share)	$ 0.36	$ 0.22
Diluted (in dollars per share)	$ 0.36	$ 0.22
Shares used in per share calculations:
Basic (in shares)	9,881	9,814
Diluted (in shares)	9,973	9,921

The aggregate costs related to goods produced and sold and services rendered by an entity during the reporting period. This excludes costs incurred during the reporting period related to financial services rendered and other revenue generating activities.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 924
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SAB Topic 11.L)
-URI https://asc.fasb.org/extlink&oid=6472922&loc=d3e499488-122856

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.2(a),(d))
-URI https://asc.fasb.org/extlink&oid=126953954&loc=SL114868664-224227