Stockholders' equity - Narrative (Details) |
May 14, 2020
shares
|
Mar. 31, 2020
$ / shares
shares
|
Dec. 31, 2019
$ / shares
shares
|
---|---|---|---|
Class of Stock [Line Items] | |||
Capital stock authorized (shares) | 500,000,000 | ||
Common stock authorized (shares) | 450,000,000 | 450,000,000 | |
Common stock par value (USD per share) | $ / shares | $ 0.01 | $ 0.01 | |
Preferred stock authorized (shares) | 50,000,000 | 50,000,000 | |
Preferred stock par value (USD per share) | $ / shares | $ 0.01 | $ 0.01 | |
Forecast | Minimum | |||
Class of Stock [Line Items] | |||
Common stock authorized (shares) | 22,500,000 | ||
Conversation ratio of reverse stock split | 0.05 | ||
Forecast | Maximum | |||
Class of Stock [Line Items] | |||
Common stock authorized (shares) | 90,000,000 | ||
Conversation ratio of reverse stock split | 0.2 |