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CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) $ in Thousands | Total | Cumulative Effect, Period of Adoption, Adjustment | Common Stock | Additional Paid-in Capital | Accumulated Other Comprehensive Income (Loss) | Accumulated Deficit | Accumulated Deficit Cumulative Effect, Period of Adoption, Adjustment
--- | --- | --- | --- | --- | --- | --- | ---
Beginning balance (in shares) at Mar. 31, 2018 |  |  | 92,847,354 |  |  |  |
Beginning balance at Mar. 31, 2018 | $ 218,774 | $ 39,901 | $ 93 | $ 425,790 | $ (5,645) | $ (201,464) | $ 39,901
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Issuance of common stock under stock plans, less withholding (in shares) |  |  | 3,272,534 |  |  |  |
Issuance of common stock under stock plans, less withholding | 4,486 |  | $ 3 | 4,483 |  |  |
Stock-based compensation expense | 45,548 |  |  | 45,548 |  |  |
Unrealized investment gain (loss) | 473 |  |  |  | 473 |  |
Foreign currency translation adjustment | (2,181) |  |  |  | (2,181) |  |
Equity component of convertible senior notes, net of issuance costs | 31,128 |  |  | 31,128 |  |  |
Net loss | (88,739) |  |  |  |  | (88,739) |
Ending balance (in shares) at Mar. 31, 2019 |  |  | 96,119,888 |  |  |  |
Ending balance at Mar. 31, 2019 | 249,390 |  | $ 96 | 506,949 | (7,353) | (250,302) |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Issuance of common stock under stock plans, less withholding (in shares) |  |  | 4,452,267 |  |  |  |
Issuance of common stock under stock plans, less withholding | 7,777 |  | $ 4 | 7,773 |  |  |
Issuance of common stock related to acquisition (in shares) |  |  | 2,606,466 |  |  |  |
Issuance of common stock related to acquisition | 35,840 |  | $ 3 | 35,837 |  |  |
Stock-based compensation expense | 71,821 |  |  | 71,821 |  |  |
Unrealized investment gain (loss) | (203) |  |  |  | (203) |  |
Foreign currency translation adjustment | (4,620) |  |  |  | (4,620) |  |
Equity component of convertible senior notes, net of issuance costs | 3,094 |  |  | 3,094 |  |  |
Net loss | (172,368) |  |  |  |  | (172,368) |
Ending balance (in shares) at Mar. 31, 2020 |  |  | 103,178,621 |  |  |  |
Ending balance at Mar. 31, 2020 | 190,731 | $ (2,800) | $ 103 | 625,474 | (12,176) | (422,670) |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Issuance of common stock under stock plans, less withholding (in shares) |  |  | 6,067,672 |  |  |  |
Issuance of common stock under stock plans, less withholding | 13,269 |  | $ 6 | 13,263 |  |  |
Issuance of common stock related to acquisition (in shares) |  |  | (111,554) |  |  |  |
Issuance of common stock related to acquisition | 8,489 |  |  | 8,489 |  |  |
Stock-based compensation expense | 108,417 |  |  | 108,417 |  |  |
Unrealized investment gain (loss) | 247 |  |  |  | 247 |  |
Foreign currency translation adjustment | 7,736 |  |  |  | 7,736 |  |
Net loss | (165,585) |  |  |  |  | (165,585) |
Ending balance (in shares) at Mar. 31, 2021 |  |  | 109,134,739 |  |  |  |
Ending balance at Mar. 31, 2021 | $ 160,504 |  | $ 109 | $ 755,643 | $ (4,193) | $ (591,055) | $ (2,800)

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