Summary of Significant Accounting Policies - Income per share (Details 1) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Numerator:
Net income per consolidated statements of income	$ (34,119)	$ 2,998
Percentage allocated to shareholders *	100.00%	99.50%
Numerator for basic and diluted earnings (loss) per share	$ (34,119)	$ 2,983
Denominator:
Denominator for basic earnings (loss) per share - weighted-average shares outstanding	7,330	7,572
Denominator for diluted earnings (loss) per share	7,330	7,572
Per share (loss) income from continuing operations
Basic	$ (4.65)	$ 0.39
Diluted	$ (4.65)	$ 0.39