Balance Sheet Components

6 Months Ended

Sep. 30, 2021

Balance Sheet Related Disclosures [Abstract]

6. Balance Sheet Components

Property and Equipment, Net

Property and equipment, net consisted of the following:


		September 30,			March 31,
		2021			2021
	(in thousands)
Computer and software		$	11,218		$	13,252
Laboratory equipment and software			49,464			48,636
Furniture and office equipment			8,803			8,803
Leasehold improvements			39,817			39,668
Capitalized asset retirement obligations			853		853
Property and equipment, gross			110,155			111,212
Less: accumulated depreciation and amortization			(56,406	)		(50,328	)
Property and equipment, net		$	53,749		$	60,884

Depreciation and amortization expense was $4.3 million and $4.6 million for the three months ended September 30, 2021 and 2020, respectively, and $8.4 million and $9.6 million for the six months ended September 30, 2021 and 2020, respectively. During the three and six months ended September 30, 2021, the Company had $2.3 million in disposals of property and equipment.

Internal-use Software, Net

Internal-use software, net consisted of the following:


	September 30,			March 31,
	2021			2021
	(in thousands)
Capitalized internal-use software	$	11,444		$	9,200
Less: accumulated amortization		(3,626	)		(2,311	)
Internal-use software, net	$	7,818		$	6,889

For the three months ended September 30, 2021 and 2020, amortization expense related to internal-use software was $0.7 million and $0.5 million, respectively, including approximately $0.1 million and $0.1 million, respectively, of stock-based compensation expense. For the six months ended September 30, 2021 and 2020, amortization expense related to internal-use software was $1.3 million and $0.8 million, respectively, including approximately $0.2 million and $0.1 million, respectively, of stock-based compensation expense. Impairment to internal-use software was nil and $0.2 million for the three months ended September 30, 2021 and 2020, respectively, and nil and $0.4 million for the six months ended September 30, 2021 and 2020, respectively.

Accrued Expense and Other Current Liabilities

Accrued expense and other current liabilities consisted of the following:


	September 30,		March 31,
	2021		2021
	(in thousands)
Accrued payables	$	18,705	$	19,869
Accrued compensation and benefits		10,351		11,749
Accrued taxes		342	166
Other		143	169
Total accrued expenses and other current liabilities	$	29,541	$	31,953