Equity - Stock Based Compensation Expense (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Stock-Based Compensation
Stock-based compensation expense	$ 81	$ 154	$ 387	$ 386
Cost of Sales [Member]
Stock-Based Compensation
Stock-based compensation expense	14	13	29	16
Research and Development Expense [Member]
Stock-Based Compensation
Stock-based compensation expense	(2)	25	24	50
Selling, General and Administrative Expenses [Member]
Stock-Based Compensation
Stock-based compensation expense	$ 69	$ 116	$ 334	$ 320