Stock-based Compensation Plans (Tables)

6 Months Ended

Mar. 31, 2022

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				Six Months Ended
	March 31,				March 31,
(In thousands)	2022		2021		2022		2021
Product costs	$	78	$	32	$	108	$	69
Research and development		296		305		731		589
Selling, general and administrative		1,345		1,092		2,560		2,204
Total	$	1,719	$	1,429	$	3,399	$	2,862

Summary of Stock Option Grant Activity

Stock option grant activity was as follows:

	Six Months Ended March 31,
	2022		2021
Stock option grant activity:
Stock options granted		283,000		234,000
Weighted average grant date fair value	$	16.36	$	13.86
Weighted average exercise price	$	43.72	$	38.65