Reportable Segment Information - Schedule of Reportable Segment Information (Details) - USD ($) $ in Thousands		3 Months Ended				6 Months Ended	9 Months Ended
		Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Jun. 30, 2021	Mar. 31, 2022	Jun. 30, 2022	Jun. 30, 2021	Sep. 30, 2021
Segment Reporting Information [Line Items]
Net Revenues		$ 19,964	$ 27,556	$ 26,463	$ 23,100	$ 54,019	$ 73,983	$ 60,865
Operating income (loss)		9,562			1,204		13,397	2,429
Identifiable Assets		130,706					130,706		$ 116,913
Operating Segments | Semiconductor
Segment Reporting Information [Line Items]
Net Revenues		15,135			19,501		61,484	52,195
Operating income (loss)		10,521			2,114		16,246	5,976
Identifiable Assets		74,165					74,165		70,631
Operating Segments | Material and Substrate
Segment Reporting Information [Line Items]
Net Revenues		4,829			3,599		12,499	8,670
Operating income (loss)		1,156			333		1,991	14
Identifiable Assets		21,286					21,286		19,541
Non-Segment Related
Segment Reporting Information [Line Items]
Operating income (loss)		(2,115)			$ (1,243)		(4,840)	$ (3,561)
Identifiable Assets	[1]	$ 35,255					$ 35,255		$ 26,741

[1] * Non-segment related assets include cash, property, and other assets.