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Segment Information - Operating Results (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Segment Reporting Information [Line Items]
Revenue	$ 56,129	$ 50,634	$ 151,167	$ 158,029
Gross profit	$ 12,550	$ 9,938	$ 31,888	$ 36,309
Gross margin	22.40%	19.60%	21.10%	23.00%
Operating Segments | Laser Products
Segment Reporting Information [Line Items]
Revenue	$ 41,132	$ 38,103	$ 104,960	$ 118,802
Gross profit	$ 12,475	$ 9,596	$ 30,261	$ 35,860
Gross margin	30.30%	25.20%	28.80%	30.20%
Operating Segments | Advanced Development
Segment Reporting Information [Line Items]
Revenue	$ 14,997	$ 12,531	$ 46,207	$ 39,227
Gross profit	$ 704	$ 850	$ 3,456	$ 2,320
Gross margin	4.70%	6.80%	7.50%	5.90%
Corporate and Other
Segment Reporting Information [Line Items]
Revenue	$ 0	$ 0	$ 0	$ 0
Gross profit	$ (629)	$ (508)	$ (1,829)	$ (1,871)

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