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Amount of the current period expense (including discontinued operations) charged against operations, the offset which is generally to the allowance for doubtful accounts for the purpose of reducing receivables, including notes receivable, to an amount that approximates their net realizable value (the amount expected to be collected).

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Revenue Recognition, Sales Returns Recognized

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A valuation allowance for trade and other receivables due to an Entity within one year (or the normal operating cycle, whichever is longer) that are expected to be uncollectible.

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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Amount of direct write-downs of accounts receivable charged against the allowance.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

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Amount of expense related to write-down of receivables to the amount expected to be collected. Includes, but is not limited to, accounts receivable and notes receivable.

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The aggregate costs incurred (1) in a planned search or critical investigation aimed at discovery of new knowledge with the hope that such knowledge will be useful in developing a new product or service, a new process or technique, or in bringing about a significant improvement to an existing product or process; or (2) to translate research findings or other knowledge into a plan or design for a new product or process or for a significant improvement to an existing product or process whether intended for sale or the entity's use, during the reporting period charged to research and development projects, including the costs of developing computer software up to the point in time of achieving technological feasibility, and costs allocated in accounting for a business combination to in-process projects deemed to have no alternative future use.

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SUMMARY OF ACCOUNTING POLICIES - Concentration of Credit Risk (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Sep. 30, 2016	Mar. 31, 2016	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
Concentration of credit risk
Research and development costs			$ 65,600	$ 61,000	$ 26,300
Inventory impairment and other	$ 92,900	$ 61,000	92,915	61,006	0
Allowance for doubtful accounts
Balance at Beginning of Year			64,608	4,534	5,529
Charged to Costs and Expenses			(184)	72,295	650
Deductions/ Write-Offs			(7,122)	(12,221)	(1,645)
Balance at End of Year		$ 64,608	57,302	64,608	$ 4,534
SunEdison, Inc
Concentration of credit risk
Bad debt charge				61,000
Sales returns recognized				90,000
Inventory impairment and other			$ 92,900
Customer one
Concentration of credit risk
Bad debt charge				$ 10,500
Services Revenue \| Maximum
Concentration of credit risk
Concentration risk percentage (less than 10% for sales of services as a % of total sales)			10.00%
Net sales \| Ten largest customers
Concentration of credit risk
Concentration risk percentage (less than 10% for sales of services as a % of total sales)			43.00%	46.00%	50.00%
Consumer Technologies Group (CTG) \| Net sales \| Customer one
Concentration of credit risk
Concentration risk percentage (less than 10% for sales of services as a % of total sales)				11.00%	17.00%
Consumer Technologies Group (CTG) \| Accounts Receivable \| Customer one
Concentration of credit risk
Concentration risk percentage (less than 10% for sales of services as a % of total sales)			17.00%	11.00%
Communications Enterprise Compute (CEC) \| Accounts Receivable \| Customer two
Concentration of credit risk
Concentration risk percentage (less than 10% for sales of services as a % of total sales)				11.00%
Mark to Market Adjustment \| SunEdison, Inc
Concentration of credit risk
Inventory impairment and other			$ 60,000
Solar Module Equipment \| SunEdison, Inc
Concentration of credit risk
Inventory impairment and other			16,000
Negative Margin Sales and Other Direct Costs \| SunEdison, Inc
Concentration of credit risk
Inventory impairment and other			$ 16,900