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Quarterly financial data (unaudited) | 12 Months Ended
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Mar. 31, 2021
Quarterly financial data (unaudited) |
Quarterly financial data (unaudited) | 16. Quarterly financial data (unaudited) The following information has been derived from unaudited consolidated financial statements that, in the opinion of management, include all recurring adjustments necessary for a fair statement of such information.
|  | Three Months Ended
|  | March 31, 2021 |  | December 31, 2020 |  | September 30, 2020 |  | June 30, 2020
Operating Expenses |  | 22,184 |  | 20,275 |  | 19,663 |  | 17,833
Net loss attributable to common stockholders |  | (21,499) |  | (21,783) |  | (20,095) |  | (17,493)
Net loss per share attributable to common stockholders, basic and diluted |  | (0.42) |  | (0.44) |  | (0.46) |  | (0.44)
|  | Three Months Ended
|  | March 31, 2020 |  | December 31, 2019 |  | September 30, 2019 |  | June 30, 2019
Operating Expenses |  | 16,385 |  | 16,664 |  | 12,242 |  | 10,907
Net loss attributable to common stockholders |  | (15,789) |  | (16,189) |  | (11,139) |  | (9,508)
Net loss per share attributable to common stockholders, basic and diluted |  | (0.41) |  | (0.46) |  | (0.35) |  | (0.30)

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- Definition The entire disclosure for quarterly financial data. Includes, but is not limited to, tabular presentation of financial information for fiscal quarters, effect of year-end adjustments, and an explanation of matters or transactions that affect comparability of the information. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -URI http://asc.fasb.org/topic&trid=2126967 + Details
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