| Line | Roll Up Total Concept | Roll Up Items Concept | Count |
|---|---|---|---|
| 1 | extr:DeferredRevenueNetOfCostOfSalesToDistributors | us-gaap:DeferredRevenue | 1 |
| 2 | extr:DeferredRevenueNetOfCostOfSalesToDistributors | extr:DeferredCostOfSales | 1 |
(Note that this is a work in progress!)