CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Oct. 31, 2018	Jan. 31, 2018
CURRENT ASSETS
Cash and cash equivalents	$ 155,791	$ 122,107
Short-term investments	158,996	311,908
Accounts receivable, net	43,612	24,756
Contract assets	55,628	13,847
Other current assets	25,465	12,410
TOTAL CURRENT ASSETS	439,492	485,028
Property, plant and equipment, net	19,866	15,299
Goodwill	34,329	34,329
Other purchased intangible assets, net	6,390	7,149
Deferred taxes	315	439
Other assets	377	426
TOTAL ASSETS	500,769	542,670
CURRENT LIABILITIES
Accounts payable	64,987	100,238
Accrued expenses	25,111	35,360
Contract liabilities	9,778	47,613
TOTAL CURRENT LIABILITIES	99,876	183,211
Deferred taxes	1,388	1,293
TOTAL LIABILITIES	101,264	184,504
COMMITMENTS AND CONTINGENCIES (Notes 8 and 9)
STOCKHOLDERS' EQUITY
Preferred stock, par value $0.10 per share - 500,000 shares authorized; no shares issued and outstanding
Common stock, par value $0.15 per share - 30,000,000 shares authorized; 15,573,952 and 15,570,952 shares issued at October 31 and January 31, 2018, respectively; 15,570,719 and 15,567,719 shares outstanding at October 31 and January 31, 2018, respectively	2,336	2,336
Additional paid-in capital	144,507	143,215
Retained earnings	253,716	211,150
Accumulated other comprehensive (loss) income	(942)	1,422
TOTAL STOCKHOLDERS' EQUITY	399,617	358,123
Non-controlling interests	(112)	43
TOTAL EQUITY	399,505	358,166
TOTAL LIABILITIES AND EQUITY	$ 500,769	$ 542,670

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.