| Form | Description | Date | Format |
|---|---|---|---|
| SC 13D/A | Amendment to a SC 13D filing | Apr 26, 2018 |     |
| SC 13G | Schedule filed to report acquisition of beneficial ownership of 5% or more of a class of equity securities by passive investors and certain institutions | Feb 15, 2018 | |
| SC 13G | Schedule filed to report acquisition of beneficial ownership of 5% or more of a class of equity securities by passive investors and certain institutions | Feb 14, 2018 | |
| SC 13G/A | Amendment to a previously filed SC 13G | Feb 13, 2018 | |
| SC 13G/A | Amendment to a previously filed SC 13G | Feb 13, 2018 | |
| SC 13G/A | Amendment to a previously filed SC 13G | Jan 30, 2018 | |
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