CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2017	Mar. 31, 2017
Current assets:
Cash and cash equivalents	$ 44,536	$ 39,040
Short-term marketable securities	218,661	190,908
Accounts receivable, net	57,327	54,055
Inventories	40,632	34,931
Prepaid expenses and other current assets	9,014	8,024
Total current assets	370,170	326,958
Long-term marketable securities	55,954	47,143
Property and equipment, net	97,697	87,777
Goodwill	34,332	31,045
In-process research and development	16,016	14,482
Long-term deferred tax assets, net	106,798	34,723
Other assets	13,686	8,286
Total assets	694,653	550,414
Current liabilities:
Accounts payable	16,667	20,620
Accrued expenses	35,256	37,703
Deferred revenue	10,584	10,495
Current portion of capital lease obligation	851	799
Total current liabilities	63,358	69,617
Other long-term liabilities	598	3,251
Contingent consideration	9,835	9,153
Long-term deferred tax liabilities	866	783
Capital lease obligation, net of current portion	15,110	15,539
Total liabilities	89,767	98,343
Commitments and contingencies (Note 10)
Stockholders' equity:
Class B Preferred Stock, $.01 par value Authorized - 1,000,000 shares; Issued and outstanding - none
Common stock, $.01 par value Authorized - 100,000,000 shares; Issued - 45,921,029 shares at September 30, 2017 and 45,249,281 shares at March 31, 2017 Outstanding - 44,200,784 shares at September 30, 2017 and 43,673,286 shares at March 31, 2017	442	437
Additional paid in capital	592,081	565,962
Retained earnings (accumulated deficit)	90,164	(46,959)
Treasury stock at cost - 1,720,245 shares at September 30, 2017 and 1,575,995 shares at March 31, 2017	(65,999)	(46,763)
Accumulated other comprehensive loss	(11,802)	(20,606)
Total stockholders' equity	604,886	452,071
Total liabilities and stockholders' equity	$ 694,653	$ 550,414

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).

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount due from customers or clients, within one year of the balance sheet date (or the normal operating cycle, whichever is longer), for goods or services (including trade receivables) that have been delivered or sold in the normal course of business, reduced to the estimated net realizable fair value by an allowance established by the entity of the amount it deems uncertain of collection.