Intangible assets (Tables)

12 Months Ended

Mar. 31, 2020

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Intangible Assets

Intangible assets comprise the following (in thousands):

		As of March 31, 2019						As of March 31, 2020
	Useful life (in years)	Gross Carrying amount		Accumulated amortization		Net		Gross Carrying amount		Accumulated amortization		Net
Patents and trademarks	3 - 20	$	86	$	(49)	$	37	$	76	$	(45)	$	31
Customer relationships	2 - 15	3,176		(2,221)		955		2,600		(2,068)		532
Internal-use software, technology and other	1 - 18	27,922		(12,035)		15,887		26,508		(12,064)		14,444
Total		$	31,184	$	(14,305)	$	16,879	$	29,184	$	(14,177)	$	15,007

Schedule of Estimated Future Amortization Expense

As of March 31, 2020, the estimated future amortization expense is as follows (in thousands):

Years ending March 31,
2021	$	3,407
2022	3,046
2023	2,698
2024	2,367
2025	1,855
Thereafter	1,635
Total	$	15,007