CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS
Revenue, net	$ 1,851	$ 2,223	$ 5,882	$ 5,855
Cost of revenue	979	931	2,817	2,562
Gross profit	872	1,292	3,065	3,293
Operating expenses:
Engineering, research and development	319	105	912	554
Selling, general and administrative	743	928	2,476	2,407
Total operating expenses	1,062	1,033	3,388	2,961
Income (loss) from operations	(190)	259	(323)	332
Other income (expense):
Other income (expense), net	207	(6)	704	(25)
Income (loss) before income taxes	17	253	381	307
Income tax expense	11	30	121	64
Net income	6	223	260	243
Net income (loss) applicable to common stockholders	$ (94)	$ 223	$ (40)	$ 243
Earnings per common share - basic	$ (0.01)	$ 0.03	$ (0.01)	$ 0.04
Earnings per common share - diluted	$ (0.01)	$ 0.03	$ (0.01)	$ 0.04
Weighted average common shares outstanding - basic	6,603	6,602	6,603	6,601
Weighted average common shares outstanding - diluted	6,603	6,602	6,603	6,601

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=123367319&loc=SL114868664-224227