Net earnings per share (Tables)

12 Months Ended

Mar. 31, 2020

Accounting Policies [Abstract]

Schedule of Earnings Per Share, Basic and Diluted

In computing the dilutive effect of potential common shares, the average stock price for the period is used in determining the number of treasury shares assumed to be purchased with the proceeds from the exercise of options.

	Year Ended March 31,
	2018		2019			2020
Income / (loss) available to common stockholders ($ in thousands)	$	4	($	463	)	$	398
Basic weighted average common shares outstanding		4,910,357		4,703,224			4,646,966
Basic net earnings / (loss) per share	$	0.00	($	0.10	)	$	0.09
Basic weighted average common shares outstanding		4,910,357		4,703,224			4,646,966
Effect of dilutive securities – Options		380,547		—			169,770
Diluted weighted average common and potential common shares outstanding		5,290,904		4,703,224			4,816,736
Diluted net earnings / (loss) per share	$	0.00	($	0.10	)	$	0.08