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Revenue Recognition (Tables) | 9 Months Ended
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Dec. 31, 2018
Revenue from Contract with Customer [Abstract] |
Cumulative effect of ASU 2014-09 | The cumulative effect to the Company’s consolidated April 1, 2018 balance sheet from the adoption of the new revenue standard and the sale of nonfinancial assets was as follows (in thousands):
| March 31, 2018 |  | Opening Adjustment |  | April 1, 2018
Assets: |  |  |  |  |
Accounts Receivable | $ | 7,365 |  |  | $ | (678 | ) |  | $ | 6,687 |
Inventory | 19,780 |  |  | (1,599 | ) |  | 18,181 |
Prepaid expenses and other current assets | 2,947 |  |  | 2,277 |  |  | 5,224 |
Notes receivable, long term portion | 2,559 |  |  | 105 |  |  | 2,664 |
Liabilities and Stockholders' Equity: |  |  |  |  |
Accounts payable and accrued expenses | $ | (12,625 | ) |  | $ | (2,729 | ) |  | $ | (15,354 | )
Deferred revenue | (13,483 | ) |  | 2,657 |  |  | (10,826 | )
Accumulated deficit | $ | (988,333 | ) |  | $ | (33 | ) |  | $ | (988,366 | )
Disaggregation of Revenue | The following tables disaggregate the Company’s revenue by product line and by shipment destination:
| Three Months Ended December 31, 2018 |  | Nine Months Ended December 31, 2018
Product Line: | Grid |  | Wind |  | Grid |  | Wind
Equipment and systems | $ | 4,614 |  |  | $ | 7,215 |  |  | $ | 17,571 |  |  | $ | 17,925 |
Services and technology development | 2,212 |  |  | 93 |  |  | 5,754 |  |  | 368 |
Total | $ | 6,826 |  |  | $ | 7,308 |  |  | $ | 23,325 |  |  | $ | 18,293 |
Region: |  |  |  |  |  |  |
Americas | $ | 3,771 |  |  | $ | 36 |  |  | $ | 16,319 |  |  | $ | 82 |
Asia Pacific | 2,815 |  |  | 7,263 |  |  | 5,930 |  |  | 18,136 |
EMEA | 240 |  |  | 9 |  |  | 1,076 |  |  | 75 |
Total | $ | 6,826 |  |  | $ | 7,308 |  |  | $ | 23,325 |  |  | $ | 18,293 |
Contract with Customer | Changes in the Company’s contract assets, which are included in “Unbilled AR” and “Deferred program costs” (see Note 7, “Accounts Receivable” and Note 8, “Inventory” for a reconciliation to the condensed consolidated balance sheet) and contract liabilities, which are included in the current portion and long term portion of “deferred revenue” in the Company’s condensed consolidated balance sheets, are as follows:
| Unbilled AR |  | Deferred Program Costs |  | Contract Liabilities
Beginning balance as of March 31, 2018 | $ | 3,016 |  |  | $ | 2,567 |  |  | $ | 21,937 |
Impact of adoption of ASC 606 | — |  |  | (1,599 | ) |  | (2,657 | )
Increases for costs incurred to fulfill performance obligations | — |  |  | 1,461 |  |  | — |
Increase (decrease) due to customer billings | (11,063 | ) |  | — |  |  | 11,167 |
Decrease due to cost recognition on completed performance obligations | — |  |  | (1,132 | ) |  | — |
Increase (decrease) due to recognition of revenue based on transfer of control of performance obligations | 9,722 |  |  | (9 | ) |  | (11,345 | )
Other changes and FX impact | (53 | ) |  | 8 |  |  | (1,040 | )
Ending balance as of December 31, 2018 | $ | 1,622 |  |  | $ | 1,296 |  |  | $ | 18,062 |
Schedule of Revenues by Major Customers | The following table sets forth customers who represented 10% or more of the Company’s total revenues for the three and nine months ended December 31, 2018 and 2017:
| Reportable |  | Three Months Ended December 31, |  | Nine Months Ended December 31,
| Segment |  | 2018 |  | 2017 |  | 2018 |  | 2017
Inox Wind Limited | Wind |  | 47 | % |  | 15 | % |  | 40 | % |  | 27 | %
Vestas | Grid |  | <10 % |  |  | 27 | % |  | 15 | % |  | 11 | %
SSE Generation Ltd. | Grid |  | <10 % |  |  | 17 | % |  | <10 % |  |  | <10 % |
Fuji Bridex Pte Ltd | Grid |  | 17 | % |  | — | % |  | <10 % |  |  | — | %

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- Definition Tabular disclosure of the extent of the entity's reliance on its major customers, if revenues from transactions with a single external customer amount to 10 percent or more of entity revenues, including the disclosure of that fact, the total amount of revenues from each such customer, and the identity of the reportable segment or segments reporting the revenues. The entity need not disclose the identity of a major customer or the amount of revenues that each segment reports from that customer. For these purposes, a group of companies known to the entity to be under common control is considered a single customer, and the federal government, a state government, a local government such as a county or municipality, or a foreign government is each considered a single customer. + References No definition available. + Details
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