Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
Mar. 31, 2020	Mar. 31, 2019
Net sales	$ 68,923	$ 62,643
Cost of sales	59,344	56,072
Gross profit	9,579	6,571
Selling, general, and administrative expense	7,945	4,247
Operating income	1,634	2,324
Other income (expense)	(401)	159
Interest income	22	4
Interest expense	(219)	(131)
Income before income taxes	1,036	2,356
Income tax expense	472	191
Net income	$ 564	$ 2,165
us-gaap_EarningsPerShareAbstract
Basic (in dollars per share)	$ 0.06	$ 0.22
Diluted (in dollars per share)	$ 0.06	$ 0.22
Shares used in per share calculations:
Basic (in shares)	9,751	9,735
Diluted (in shares)	9,829	9,735

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 http://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 http://asc.fasb.org/extlink&oid=120395209&loc=SL114868664-224227