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Balance sheet components | 9 Months Ended
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Jun. 30, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract] |
Balance sheet components | Balance sheet components Inventories Inventories, net, consist of the following:
| June 30, 2018 |  | September 30, 2017
(In thousands) |
Finished goods | $ | 98,565 |  |  | $ | 104,014 |
Components | 14,846 |  |  | 9,842 |
Inventories | $ | 113,411 |  |  | $ | 113,856 |
The Company writes down inventory as a result of excess and obsolete inventories, or when it believes that the net realizable value of inventories is less than the carrying value. Deferred revenue Amounts invoiced in advance of revenue recognition are recorded as deferred revenue on the condensed consolidated balance sheets. Changes in deferred revenue balances as of June 30, 2018 and July 1, 2017 were as follows:
| June 30, 2018 |  | July 1, 2017
(In thousands) |  |  |
Deferred revenue, beginning of period | $ | 45,567 |  |  | $ | 36,160 |
Recognition of revenue included in beginning of period deferred revenue | (8,367 | ) |  | (5,171 | )
Revenue deferred, net of revenue recognized on contracts in the respective period | 18,594 |  |  | 11,817 |
Deferred revenue, end of period | $ | 55,794 |  |  | $ | 42,806 |
As of June 30, 2018, deferred revenue was $55.8 million. The Company expects to recognize approximately $8.9 million in the remainder of fiscal 2018, $11.0 million in fiscal 2019, $10.3 million in fiscal 2020, $9.0 million in fiscal 2021, $7.2 million in fiscal 2022 and $9.4 million thereafter.

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- Definition The entire disclosure for supplemental balance sheet disclosures, including descriptions and amounts for assets, liabilities, and equity. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -URI http://asc.fasb.org/topic&trid=2122208 + Details
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