Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents	$ 198,320	$ 222,962
Restricted cash	402	0
Short-term investments	84,813	0
Accounts and other receivables, net	54,787	197,941
Inventory	113,615	88,254
Prepaid expenses and other current assets	16,438	20,006
Total current assets	468,375	529,163
Assets, Noncurrent [Abstract]
Long-term restricted cash	1,655	1,655
Long-term investment in sales-type lease, net	29,525	31,050
Property and equipment, net	38,233	30,620
Service spares, net	2,911	3,023
Goodwill	14,182	14,182
Intangible assets other than goodwill, net	1,448	1,637
Deferred tax assets	96,947	85,613
Other non-current assets	15,408	17,629
TOTAL ASSETS	668,684	714,572
Current liabilities:
Accounts payable	31,186	45,504
Accrued payroll and related expenses	10,105	17,199
Other accrued liabilities	4,296	10,303
Deferred revenue	73,074	83,129
Total current liabilities	118,661	156,135
Liabilities, Noncurrent [Abstract]
Long-term deferred revenue	27,639	27,258
Other non-current liabilities	13,211	5,703
TOTAL LIABILITIES	159,511	189,096
Shareholders’ equity:
Preferred stock — Authorized and undesignated, 5,000,000 shares; no shares issued or outstanding	0	0
Common stock and additional paid-in capital, par value $.01 per share — Authorized, 75,000,000 shares; issued and outstanding 40,300,399 and 40,757,458 shares, respectively	625,513	622,604
Accumulated other comprehensive income	2,850	2,782
Accumulated deficit	(119,190)	(99,910)
TOTAL SHAREHOLDERS’ EQUITY	509,173	525,476
TOTAL LIABILITIES AND SHAREHOLDERS’ EQUITY	$ 668,684	$ 714,572

The aggregate of amounts due from customers or clients, within one year of the balance sheet date (or one operating cycle, if longer), for goods or services that have been delivered or sold in the normal course of business and an amount representing an agreement for an unconditional promise by the maker to pay the entity (holder) a definite sum of money at a future date within one year of the balance sheet, reduced to their estimated net realizable fair value by an allowance established by the entity of the amount it deems uncertain of collection and net of any write-downs taken for collection uncertainty on the part of the holder, respectively.

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Period Type:	instant

- Definition

Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).