| Date | Form | Description | XBRL | |
|---|---|---|---|---|
| 05/07/18 | 4 | Statement of changes in beneficial ownership of securities | 
       
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  |
| 05/07/18 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  |
| 05/02/18 | 10-Q | Quarterly report pursuant to Section 13 or 15(d) | 
       
   | 
  
                  | 
| 05/02/18 | 8-K | Current report filing | 
       
   | 
  |
| 04/30/18 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  |
| 04/19/18 | 8-K | Current report filing | 
       
   | 
  |
| 04/19/18 | 8-K | Current report filing | 
       
   | 
  |
| 04/06/18 | 8-K | Current report filing | 
       
   | 
  |
| 04/06/18 | 8-K | Current report filing | 
       
   | 
  |
| 04/06/18 | DEFA14A | Additional definitive proxy soliciting materials and Rule 14(a)(12) material | 
       
   | 
  

