CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jan. 31, 2019	Jan. 31, 2018
CURRENT ASSETS
Cash and cash equivalents	$ 164,318	$ 122,107
Short-term investments	132,213	311,908
Accounts receivable, net	36,174	26,287
Contract assets	58,357	13,847
Other current assets	25,286	10,878
TOTAL CURRENT ASSETS	416,348	485,027
Property, plant and equipment, net	19,778	15,299
Goodwill	32,838	34,329
Other purchased intangible assets, net	6,137	7,149
Deferred taxes	1,257	439
Other assets	290	426
TOTAL ASSETS	476,648	542,669
CURRENT LIABILITIES
Accounts payable	44,427	100,238
Accrued expenses	29,500	35,360
Contract liabilities	8,349	47,664
TOTAL CURRENT LIABILITIES	82,276	183,262
Deferred taxes		1,279
TOTAL LIABILITIES	82,276	184,541
COMMITMENTS AND CONTINGENCIES (Notes 10 and 11)
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; 15,577,102 and 15,570,952 shares issued at January 31, 2019 and 2018, respectively; 15,573,869 and 15,567,719 shares outstanding at January 31, 2019 and 2018, respectively	2,337	2,336
Additional paid-in capital	144,961	143,215
Retained earnings	247,616	211,112
Accumulated other comprehensive (loss) income	(346)	1,422
TOTAL STOCKHOLDERS' EQUITY	394,568	358,085
Non-controlling interests	(196)	43
TOTAL EQUITY	394,372	358,128
TOTAL LIABILITIES AND EQUITY	$ 476,648	$ 542,669

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.