Inventories

12 Months Ended

Mar. 31, 2020

Inventory Disclosure [Abstract]

Inventories

3 Inventories

The components of inventories are as follows:

	March 31,
	2019		2020
	$ in thousands		$ in thousands
Raw materials		297		357
Work in progress		218		429
Finished goods		314		392
		829		1,178

During the fiscal years ended March 31, 2018, 2019 and 2020, based upon material composition and expected usage, provisions for inventories of approximately $569,000, $73,000 and $72,000, respectively, were charged to the consolidated statements of operations under cost of revenue.