Stock-based Compensation Plans (Tables)

6 Months Ended

Mar. 31, 2023

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Stock-based Compensation Expenses

Stock-based compensation expense was reported as follows in the condensed consolidated statements of operations:

	Three Months Ended March 31,				Six Months Ended March 31,
(In thousands)	2023		2022		2023		2022
Product costs	$	72	$	78	$	139	$	108
Research and development		329		296		703		731
Selling, general and administrative		1,381		1,345		2,905		2,560
Total	$	1,782	$	1,719	$	3,747	$	3,399

Summary of Stock Option Grant Activity

Stock option grant activity was as follows:

	Six Months Ended March 31,
	2023		2022
Stock option grant activity:
Stock options granted		293,000		283,000
Weighted average grant date fair value	$	15.27	$	16.36
Weighted average exercise price	$	35.40	$	43.72