Segment Information - Operating Results (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Segment Reporting Information [Line Items]
Revenue	$ 44,527	$ 54,091
Gross profit	$ 7,488	$ 14,263
Gross margin	16.80%	26.40%
Operating Segments | Laser Products
Segment Reporting Information [Line Items]
Revenue	$ 29,370	$ 41,107
Gross profit	$ 6,680	$ 14,281
Gross margin	22.70%	34.70%
Operating Segments | Advanced Development
Segment Reporting Information [Line Items]
Revenue	$ 15,157	$ 12,984
Gross profit	$ 1,349	$ 682
Gross margin	8.90%	5.30%
Corporate and Other
Segment Reporting Information [Line Items]
Revenue	$ 0	$ 0
Gross profit	$ (541)	$ (700)