CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jul. 31, 2017	Jan. 31, 2017
CURRENT ASSETS
Cash and cash equivalents	$ 153,225	$ 167,198
Short-term investments	403,925	355,796
Accounts receivable	72,517	54,836
Costs and estimated earnings in excess of billings	8,194	3,192
Prepaid expenses and other current assets	4,766	6,927
TOTAL CURRENT ASSETS	642,627	587,949
Property, plant and equipment, net	14,821	13,112
Goodwill	34,913	34,913
Intangible Assets - Net Amount	7,663	8,181
Deferred taxes	434	241
Other assets	514	92
TOTAL ASSETS	700,972	644,488
CURRENT LIABILITIES
Accounts payable	131,001	101,944
Accrued expenses	33,116	39,539
Billings in excess of costs and estimated earnings	190,581	209,241
TOTAL CURRENT LIABILITIES	354,698	350,724
Deferred taxes	1,206	1,195
TOTAL LIABILITIES	355,904	351,919
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; 15,541,952 and 15,461,452 shares issued at July 31,2017 and January 31, 2017, respectively; 15,538,719 and 15,458,219 shares outstanding at July 31 and January 31, 2017, respectively	2,331	2,319
Additional paid-in capital	140,182	135,426
Retained earnings	202,413	154,649
Accumulated other comprehensive income (loss)	131	(762)
TOTAL STOCKHOLDERS' EQUITY	345,057	291,632
Non-controlling interests	11	937
TOTAL EQUITY	345,068	292,569
TOTAL LIABILITIES AND EQUITY	$ 700,972	$ 644,488

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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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.