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| 0001085869-18-000065-index.html | 2018-09-11 16:42:31 | |
| 0001085869-18-000065.txt | 2018-09-11 16:42:31 | |
| prft8k_closingdebtoffering.htm | 38969 | 2018-09-11 16:42:31 |
 prftindentureexecutio_image1.gif | 1994 | 2018-09-11 16:42:31 |
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| prft_debtofferingxhedgeform.htm | 247898 | 2018-09-11 16:42:31 |
| prft_debtofferingxindentur.htm | 765024 | 2018-09-11 16:42:31 |
| prft_debtofferingxnoteform.htm | 87030 | 2018-09-11 16:42:31 |
| prft_debtofferingxpurchase.htm | 292785 | 2018-09-11 16:42:31 |
| prft_debtofferingxwarrantf.htm | 231838 | 2018-09-11 16:42:31 |