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Revenue Recognition (Tables)

6 Months Ended

Sep. 30, 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 September 30, 2018								Six Months Ended September 30, 2018
Product Line:	Grid				Wind				Grid				Wind
Equipment and systems	$	5,503			$	7,219			$	12,957			$	10,711
Services and technology development	2,066				88				3,541				274
Total	$	7,569			$	7,307			$	16,498			$	10,985
Region:
Americas	$	5,052			$	24			$	12,548			$	47
Asia Pacific	2,308				7,278				3,115				10,873
EMEA	209				5				835				65
Total	$	7,569			$	7,307			$	16,498			$	10,985

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	—				1,267				—
Increase (decrease) due to customer billings	(7,886		)		—				7,828
Decrease due to cost recognition on completed performance obligations	—				(1,033		)		—
Increase (decrease) due to recognition of revenue based on transfer of control of performance obligations	7,439				(9		)		(8,296		)
Other changes and FX impact	(19		)		24				(864		)
Ending balance as of September 30, 2018	$	2,550			$	1,217			$	17,948

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 six months ended September 30, 2018 and 2017:

	Reportable		Three months ended September 30,						Six months ended September 30,
	Segment		2018			2017			2018			2017
Inox Wind Limited	Wind		45	%		46	%		36	%		35	%
Vestas	Grid		11	%		—	%		23	%		—	%
Quanta Power	Grid		12	%		—	%		<10%			—	%
U.S. Navy	Grid		<10%			—	%		<10%			16	%
YMC Inc.	Grid		—	%		15	%		—	%		<10%

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