CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2017	Mar. 31, 2017
Current assets:
Cash and cash equivalents	$ 43,970	$ 39,040
Short-term marketable securities	207,441	190,908
Accounts receivable, net	53,557	54,055
Inventories	36,926	34,931
Prepaid expenses and other current assets	9,021	8,024
Total current assets	350,915	326,958
Long-term marketable securities	37,669	47,143
Property and equipment, net	92,804	87,777
Goodwill	33,199	31,045
In-process research and development	15,487	14,482
Long-term deferred tax assets, net	113,457	34,723
Other assets	8,686	8,286
Total assets	652,217	550,414
Current liabilities:
Accounts payable	12,784	20,620
Accrued expenses	35,695	37,703
Deferred revenue	9,697	10,495
Current portion of capital lease obligation	829	799
Total current liabilities	59,005	69,617
Other long-term liabilities	588	3,251
Contingent consideration	9,418	9,153
Long-term deferred tax liabilities	837	783
Capital lease obligation, net of current portion	15,325	15,539
Total liabilities	85,173	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 - 45,791,680 shares at June 30, 2017 and 45,249,281 shares at March 31, 2017 Outstanding - 44,080,941 shares at June 30, 2017 and 43,673,286 shares at March 31, 2017	441	437
Additional paid in capital	580,017	565,962
Retained earnings (accumulated deficit)	65,661	(46,959)
Treasury stock at cost - 1,710,739 shares at June 30, 2017 and 1,575,995 shares at March 31, 2017	(64,567)	(46,763)
Accumulated other comprehensive loss	(14,508)	(20,606)
Total stockholders' equity	567,044	452,071
Total liabilities and stockholders' equity	$ 652,217	$ 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).

Name:	us-gaap_AccountsPayableCurrent
Namespace Prefix:	us-gaap_
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.