We have operating lease agreements for our offices in the United States and India with lease periods expiring between 2021 and 2026.

Total operating lease costs were $9,190, $10,309, and $8,174 for the years ended March 31, 2021, 2020, and 2019, respectively. Components of operating lease costs are summarized as follows:

	Fiscal Year Ended March 31,
	2021			2020
Operating lease costs	$	8,235		$	9,558
Short-term lease costs		25			102
Variable lease costs		1,444			827
Less: Sublease income		(514	)		(178	)
Total operating lease costs	$	9,190		$	10,309

Supplemental cash flow information related to operating leases is summarized as follows:

	Fiscal Year Ended March 31,
	2021		2020
Cash paid for amounts included in the measurement of operating lease liabilities	$	18,651	$	11,527
Operating lease assets obtained in exchange for operating lease liabilities		3,107		8,494

As of March 31, 2021, our operating leases had a weighted average remaining lease term of 3.1 years and a weighted average discount rate of 3.5%. Future minimum aggregate lease payments under operating leases as of March 31, 2021 are summarized as follows:

For the year ended March 31,
2022	$	13,725
2023		8,220
2024		6,272
2025		3,790
2026		1,257
Total future lease payments		33,264
Less interest		(2,076	)
Total lease liabilities	$	31,188

During the year ended March 31, 2021, as part of our response to the COVID-19 pandemic and ongoing cost reduction efforts, we vacated our Cary office, portions of our Irvine and Horsham offices, and the remainder of our San Diego office. We recorded impairments of $5,539 to our operating right-of-use assets and certain related fixed assets associated with the vacated locations based on projected sublease rental income and estimated sublease commencement dates and the remeasurement of our operating lease liabilities associated with the modification of certain lease expiration dates. The impairment analyses were performed by operating right-of-use asset and the impairment charges were estimated by comparing the fair value of each operating right-of-use asset based on the expected cash flows to its respective book value. We determined the discount rate for each lease based on the approximate interest rate on a collateralized basis with similar remaining terms and payments as of the impairment date. Significant judgment was required to estimate the fair value of each operating right-of-use asset and actual results could vary from the estimates, resulting in potential future adjustments to amounts previously recorded.

During the year ended March 31, 2020, we recorded impairments of $9,373 to our operating right-of-use assets and certain related fixed assets associated with the vacated locations, or portions thereof, in North Canton, San Diego, Horsham, St. Louis, Irvine, Atlanta, Brentwood, and Phoenix based on projected sublease rental income and estimated sublease commencement dates.