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Revenue Recognition - Cumulative Effect of ASU 2014-09 (Details) - USD ($) $ in Thousands | Jun. 30, 2018 | Apr. 01, 2018 | Mar. 31, 2018
--- | --- | --- | ---
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |
Inventory | $ 18,353 |  | $ 19,780
Prepaid expenses and other current assets | 4,709 |  | 2,947
Note receivable | 2,720 |  | 2,559
Accounts payable and accrued expenses | (15,144) |  | (12,625)
Deferred revenue | (8,040) |  | (8,454)
Accumulated deficit | $ (993,037) |  | (988,333)
Accounting Standards Update 2014-09 |  |  |
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |
Inventory |  | $ 18,181 |
Prepaid expenses and other current assets |  | 4,546 |
Note receivable |  | 2,664 |
Accounts payable and accrued expenses |  | (15,354) |
Deferred revenue |  | (10,826) |
Accumulated deficit |  | $ (988,366) |
Difference between Revenue Guidance in Effect before and after Topic 606 | Accounting Standards Update 2014-09 |  |  |
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |
Inventory |  |  | (1,599)
Prepaid expenses and other current assets |  |  | 1,599
Note receivable |  |  | 105
Accounts payable and accrued expenses |  |  | (2,729)
Deferred revenue |  |  | 2,657
Accumulated deficit |  |  | (33)
Calculated under Revenue Guidance in Effect before Topic 606 | Accounting Standards Update 2014-09 |  |  |
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |
Inventory |  |  | 19,780
Prepaid expenses and other current assets |  |  | 2,947
Note receivable |  |  | 2,559
Accounts payable and accrued expenses |  |  | (12,625)
Deferred revenue |  |  | (13,483)
Accumulated deficit |  |  | $ (988,333)

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- Definition Sum of the carrying values as of the balance sheet date of obligations incurred through that date and due within one year (or the operating cycle, if longer), including liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received, taxes, interest, rent and utilities, accrued salaries and bonuses, payroll taxes and fringe benefits. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19,20) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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