DETAILS OF CERTAIN BALANCE SHEET ACCOUNTS (Tables)

12 Months Ended

Mar. 31, 2019

Balance Sheet Related Disclosures [Abstract]

Accounts receivable, net

Accounts receivable, net:

	March 31,
(in thousands)	2018			2019
Accounts receivable	$	202,270		$	393,415
Provisions for returns	(10,225		)	—			1
Provisions for promotions and rebates	(38,284		)	(50,789		)	1
Provisions for doubtful accounts and sales allowances	(873		)	(4,956		)
Accounts receivable, net	$	152,888		$	337,671

⁽¹⁾ Upon adoption of ASC 606, the provision for returns and certain provisions for promotions, rebates and other were reclassified to accrued liabilities as these reserve balances are considered refund liabilities. Refer to Note 3, Recent Accounting Pronouncements, for additional information on the adoption impact.

Inventory, net

Inventory, net:

	March 31,
(in thousands)	2018		2019
Raw materials	$	28,789	$	34,054
Work in process	450		274
Finished goods	39,037		142,818
Inventory, net	$	68,276	$	177,146

Property, Plant and Equipment

Property, plant, and equipment, net:

	March 31,
(in thousands)	2018			2019
Land	$	16,564		$	16,418
Buildings and improvements (useful life: 7-30 years)	115,401			138,000
Machinery and equipment (useful life: 2-10 years)	112,719			158,326
Software (useful life: 5-6 years)	50,631			68,985
Construction in progress	5,428			13,099
Property, plant, and equipment, gross	300,743			394,829
Accumulated depreciation and amortization	(158,614		)	(190,002		)
Property, plant, and equipment, net	$	142,129		$	204,826

Accrued Liabilities

Accrued Liabilities:

	March 31,		March 31,
(in thousands)	2018		2019
Short term deferred revenue	$	2,986	$	133,200
Employee compensation and benefits	28,599		68,882
Income tax payable	5,583		5,692
Provision for returns	—		24,632		1
Marketing incentives liabilities	—		25,369		1
Discounts reserve	—		46,894		1
Accrued interest	10,424		10,425
Warranty obligation	7,550		15,736
VAT/Sales tax payable	5,353		11,804
Derivative liabilities	2,947		3,275
Accrued other	16,655		52,806
Accrued liabilities	$	80,097	$	398,715

⁽¹⁾ Upon adoption of ASC 606, the provision for returns and certain provisions for promotions, rebates and other were reclassified to accrued liabilities as these reserve balances are considered refund liabilities. Refer to Note 3, Recent Accounting Pronouncements, for additional information on the adoption impact.

Changes in the warranty obligation accrual

	Year ended March 31,
(in thousands)	2018			2019
Warranty obligation at beginning of year	$	8,697		$	9,604
Polycom warranty obligation (1)	—			9,095
Warranty provision related to products shipped	9,923			19,884
Deductions for warranty claims processed	(10,193		)	(20,638		)
Adjustments related to preexisting warranties	1,177			39
Warranty obligation at end of year (2)	$	9,604		$	17,984

⁽¹⁾ Represents warranty obligation assumed upon completion of the Acquisition on July 2, 2018. 

⁽²⁾ Includes both short-term and long-term portion of warranty obligation.