Consolidated Statements of Operations (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Revenues:
Total revenues	$ 21,050	$ 18,389	$ 56,766	$ 51,036
Cost of revenues:
Total cost of revenues	10,101	9,114	27,936	26,241
Gross profit	10,949	9,275	28,830	24,795
Operating expense:
Selling, general and administrative	6,505	5,746	19,085	17,955
Research, development and engineering	1,616	2,047	4,717	5,241
Loss on sale of property and equipment	576	0	576	0
Total operating expense	8,697	7,793	24,378	23,196
Operating income	2,252	1,482	4,452	1,599
Other income/(expense):
Investment income	1	76	65	324
Other income/(expense)	14	1	19	(5)
Interest expense	(1)	(4)	(2)	(15)
Total other income	14	73	82	304
Income from continuing operations before income taxes	2,266	1,555	4,534	1,903
Income tax (benefit)/expense	(836)	325	(257)	(1,293)
Net income from continuing operations	3,102	1,230	4,791	3,196
Loss from discontinued operations, net of income tax of $464	0	0	(1,436)	0
Net income	3,102	1,230	3,355	3,196
Preferred stock dividend	$ 0	113	0	285
Net income attributable to common stockholders		$ 1,117	$ 3,355	$ 2,911
Net income per share from continuing operations:
Basic (in dollars per share)	$ 0.10	$ 0.04	$ 0.16	$ 0.11
Diluted (in dollars per share)	0.10	0.04	0.15	0.10
Net loss per share from discontinued operations:
Basic (in dollars per share)	0	0	(0.05)	0
Diluted (in dollars per share)	0	0	(0.04)	0
Net income per share attributable to common stockholders:
Basic (in dollars per share)	0.10	0.04	0.11	0.10
Diluted (in dollars per share)	$ 0.10	$ 0.03	$ 0.10	$ 0.09
Weighted average shares:
Basic (in shares)	30,809,896	28,291,297	30,593,954	28,193,330
Diluted (in shares)	32,411,086	32,115,847	32,478,625	31,768,575
Lightwave
Revenues:
Total revenues	$ 15,350	$ 13,088	$ 39,837	$ 35,129
Cost of revenues:
Total cost of revenues	5,670	5,449	15,736	15,063
Operating expense:
Operating income	2,509	859	3,654	667
Luna Labs
Revenues:
Total revenues	5,700	5,301	16,929	15,907
Cost of revenues:
Total cost of revenues	4,431	3,665	12,200	11,178
Operating expense:
Operating income	$ (257)	$ 623	$ 798	$ 932