Accounts Receivable and Inventory by Reportable Segments (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Accounts Receivable
Total accounts receivable	$ 115,617	$ 75,054
Inventories
Total inventories	125,657	92,737
Total segment assets	241,274	167,791
Photonics
Accounts Receivable
Total accounts receivable	31,392	27,328
Inventories
Total inventories	49,146	35,878
Vision
Accounts Receivable
Total accounts receivable	44,078	33,194
Inventories
Total inventories	34,621	41,137
Precision Motion
Accounts Receivable
Total accounts receivable	40,147	14,532
Inventories
Total inventories	$ 41,890	$ 15,722