| Date | Form | Description | XBRL | Pages | |
|---|---|---|---|---|---|
| 05/15/18 | 8-K | Current report filing | 
       
   | 
  7 | |
| 05/14/18 | 10-Q | Quarterly report pursuant to Section 13 or 15(d) | 
       
   | 
  
                                | 
  52 | 
| 04/30/18 | DEF 14A | Definitive proxy statements | 
       
   | 
  46 | |
| 04/30/18 | DEFA14A | Additional definitive proxy soliciting materials and Rule 14(a)(12) material | 
       
   | 
  5 | |
| 04/20/18 | PRE 14A | Preliminary proxy statement not related to a contested matter or merger/acquisition | 
       
   | 
  50 | |
| 03/29/18 | 8-K | Current report filing | 
       
   | 
  8 | |
| 03/29/18 | 10-K | Annual report pursuant to Section 13 and 15(d) | 
       
   | 
  
                                | 
  91 | 
| 11/30/17 | S-8 | Initial registration statement for securities to be offered to employees pursuant to employee benefit plans | 
       
   | 
  12 | |
| 11/20/17 | CT ORDER | Confidential treatment order | 
       
   | 
  1 | |
| 11/14/17 | 10-Q/A | Quarterly report pursuant to Section 13 or 15(d) | 
       
   | 
  143 | 



