Investment Securities (Tables)

12 Months Ended

Mar. 31, 2020

Investment Securities.

Summary of investment securities

The following is a summary of investment securities at March 31, 2020:

			Gross		Gross
	Amortized		Unrealized		Unrealized
	Cost		Gains		Losses		Fair Value
Time Deposits:
Current	$	3,927	$	—		—	$	3,927
Equity securities:
Mutual funds:
Current		5,623		235		—		5,858
Equity Shares/ Options:
Non-current		1		3		—		4
Total investment securities	$	9,551	$	238	$	—	$	9,789

The following is a summary of investment securities at March 31, 2019:

			Gross		Gross
	Amortized		Unrealized		Unrealized
	Cost		Gains		Losses		Fair Value
Available-for-sale debt securities:
Corporate bonds:
Current	$	2,779	$	1	$	(2)	$	2,778
Non-current		—		—		—		—
Preference shares:		188		—		—		188
Agency and short-term notes:
Current		1,492		1		—		1,493
Time deposits:
Current		15,861		—		—		15,861
Equity securities:
Mutual funds:
Current		12,912		94		—		13,006
Equity Shares/ Options:
Non-current		8		126		—		134
Total investment securities	$	33,240	$	222	$	(2)	$	33,460

Summary of other-than-temporary impairment unrealized losses recognized

	Year Ended
	March 31, 2020		March 31, 2019
Unrealized losses recognized in other comprehensive income (loss) beginning balance	$	—	$	70
Add: unrealized losses recognized		184		1,341
Less: Other-than-temporary impairment recognized in earnings		(184)		(1,411)
Unrealized losses in other comprehensive income (loss) ending balance	$	—	$	—

Schedule of gross unrealized losses and fair value of the Company's investment securities with unrealized losses that are not deemed to be other-than-temporarily impaired

The following tables show the gross unrealized losses and fair value of the Company’s investment securities with unrealized losses that are not deemed to be other-than-temporarily impaired, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position at March 31, 2020 and 2019:

Less Than 12 Months

			Gross
			Unrealized
	Fair Value		Loss
Available-for-sale debt securities at March 31, 2020:
Corporate bonds	$	—	$	—
Agency bonds		—		—
Preference shares		—		—
Total	$	—	$	—
Available-for-sale debt securities at March 31, 2019:
Corporate bonds	$	253	$	—
Agency bonds		—		—
Mutual funds		—		—
Total	$	253	$	—

Greater Than 12 Months

			Gross
			Unrealized
	Fair Value		Loss
Available-for-sale debt securities at March 31, 2020:
Corporate bonds	$	—	$	—
Agency bonds		—		—
Preference shares		—		—
Total	$	—	$	—
Available-for-sale debt securities at March 31, 2019:
Corporate bonds	$	2,297	$	(2)
Agency bonds		—		—
Preference shares		—		—
Total	$	2,297	$	(2)

Schedule of available-for-sale securities by contractual maturity

	March 31, 2020
Due in one year or less	$	9,785
Due after 1 year through 5 years		4
Due after 5 years		—
Total	$	9,789

Schedule of proceeds from sales of available-for-sale debt and equity securities and the gross gains and losses included in earnings as a result

	Year Ended March 31,
	2020		2019		2018
Proceeds from sales or maturities of available-for-sale debt securities and equity securities	$	58,408	$	109,512	$	158,800
Gross gains	$	679	$	1,023	$	1,655
Gross losses		—		(13)		(127)
Net realized gains on sales of available-for-sale debt securities and equity securities	$	679	$	1,010	$	1,528