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Net Income Per Share - Basic and Diluted EPS (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2021 | Jun. 30, 2020
Numerator: |  |  |  |
Net income attributable to Innoviva stockholders, basic | $ 88,948 | $ 76,844 | $ 183,071 | $ 142,281
Add: interest expense on 2023 Notes | 1,163 | 1,184 | 2,367 | 2,364
Net income attributable to Innoviva stockholders, diluted | $ 90,111 | $ 78,028 | $ 185,438 | $ 144,645
Denominator: |  |  |  |
Weighted-average shares used to compute basic net income per share attributable to Innoviva stockholders | 88,423 | 101,324 | 94,858 | 101,280
Dilutive effect of 2023 Notes | 12,189 | 12,189 | 12,189 | 12,189
Dilutive effect of options and awards granted under equity incentive plan and employee stock purchase plan | 27 | 32 | 49 | 58
Weighted-average shares used to compute diluted net income per share attributable to Innoviva stockholders | 100,639 | 113,545 | 107,096 | 113,527
Net income per share attributable to Innoviva stockholders |  |  |  |
Basic net income per share | $ 1.01 | $ 0.76 | $ 1.93 | $ 1.40
Diluted net income per share | $ 0.90 | $ 0.69 | $ 1.73 | $ 1.27
Convertible senior notes | 2025 Notes |  |  |  |
Net Income Per Share |  |  |  |
Dilutive effect of the assumed conversion premium | 0 | 0 | 0 | 0
Convertible senior notes | 2025 Notes | Common stock |  |  |  |
Net Income Per Share |  |  |  |
Conversion price of convertible notes into common stock (in dollars per share) | $ 17.26 | $ 17.26 | $ 17.26 | $ 17.26

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