Condensed Consolidated Balance Sheets (USD $)	Jul. 31, 2014	Jan. 31, 2014
CURRENT ASSETS
Cash and cash equivalents	$ 345,158,000	$ 272,209,000
Accounts receivable, net of allowance for doubtful accounts	34,217,000	23,687,000
Costs and estimated earnings in excess of billings	430,000	527,000
Prepaid expenses	2,575,000	1,581,000
Deferred income tax assets	341,000	178,000
Other current assets	1,084,000	377,000
TOTAL CURRENT ASSETS	383,805,000	298,559,000
Property, plant and equipment, net of accumulated depreciation	4,052,000	4,183,000
Goodwill	18,476,000	18,476,000
Intangible assets, net of accumulated amortization	1,967,000	2,088,000
TOTAL ASSETS	408,300,000	323,306,000
CURRENT LIABILITIES
Accounts payable	39,937,000	22,589,000
Accrued expenses	7,971,000	7,912,000
Billings in excess of costs and estimated earnings	181,584,000	134,736,000
TOTAL CURRENT LIABILITIES	229,492,000	165,237,000
Deferred income tax liabilities	330,000	292,000
TOTAL LIABILITIES	229,822,000	165,529,000
COMMITMENTS AND CONTINGENCIES (Note 12)
STOCKHOLDERS' EQUITY
Preferred stock, par value $0.10 per share - 500,000 shares authorized; no shares issued and outstanding	0	0
Common stock, par value $0.15 per share - 30,000,000 shares authorized; 14,442,934 and 14,289,134 shares issued at July 31 and January 31, 2014, respectively; 14,439,701 and 14,285,901 shares outstanding at July 31 and January 31, 2014, respectively	2,166,000	2,143,000
Additional paid-in capital	104,720,000	100,863,000
Retained earnings	65,360,000	53,335,000
Treasury stock at cost - 3,233 shares at July 31 and January 31, 2014	(33,000)	(33,000)
TOTAL STOCKHOLDERS' EQUITY	172,213,000	156,308,000
Noncontrolling interests (Note 2)	6,265,000	1,469,000
TOTAL EQUITY	178,478,000	157,777,000
TOTAL LIABILITIES AND EQUITY	$ 408,300,000	$ 323,306,000