Condensed Consolidated Balance Sheets (USD $)	Oct. 31, 2014	Jan. 31, 2014
CURRENT ASSETS
Cash and cash equivalents	$ 361,021,000	$ 272,209,000
Accounts receivable, net of allowance for doubtful accounts	22,905,000	23,687,000
Costs and estimated earnings in excess of billings	314,000	527,000
Prepaid expenses	1,977,000	1,754,000
Notes receivable and accrued interest	1,711,000	204,000
Deferred income tax assets	517,000	178,000
TOTAL CURRENT ASSETS	388,445,000	298,559,000
Property, plant and equipment, net of accumulated depreciation (including $1,617,000 in costs related to a variable interest entity as of October 31, 2014)	5,551,000	4,183,000
Goodwill	18,476,000	18,476,000
Intangible assets, net of accumulated amortization	1,906,000	2,088,000
TOTAL ASSETS	414,378,000	323,306,000
CURRENT LIABILITIES
Accounts payable	44,941,000	22,589,000
Dividends payable	10,166,000
Accrued expenses	15,228,000	7,912,000
Billings in excess of costs and estimated earnings	156,159,000	134,736,000
TOTAL CURRENT LIABILITIES	226,494,000	165,237,000
Deferred income tax liabilities	295,000	292,000
TOTAL LIABILITIES	226,789,000	165,529,000
COMMITMENTS AND CONTINGENCIES (Note 13)
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; 14,532,434 and 14,289,134 shares issued at October 31 and January 31, 2014, respectively; 14,529,201 and 14,285,901 shares outstanding at October 31 and January 31, 2014, respectively	2,180,000	2,143,000
Additional paid-in capital	107,223,000	100,863,000
Retained earnings	67,616,000	53,335,000
Treasury stock at cost - 3,233 shares at October 31 and January 31, 2014	(33,000)	(33,000)
TOTAL STOCKHOLDERS' EQUITY	176,986,000	156,308,000
Noncontrolling interests (Note 2)	10,603,000	1,469,000
TOTAL EQUITY	187,589,000	157,777,000
TOTAL LIABILITIES AND EQUITY	$ 414,378,000	$ 323,306,000