CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($)	Jul. 31, 2015	Jan. 31, 2015
CURRENT ASSETS
Cash and cash equivalents	$ 182,136,000	$ 333,691,000
Short-term investments	117,064,000
Accounts receivable, net of allowance for doubtful accounts	38,839,000	27,330,000
Costs and estimated earnings in excess of billings	2,943,000	455,000
Notes receivable and accrued interest, net of allowance for doubtful amounts	6,281,000	1,786,000
Prepaid expenses and other current assets	2,856,000	1,092,000
TOTAL CURRENT ASSETS	350,119,000	364,354,000
Property, plant and equipment, net of accumulated depreciation (including $2,658,000 in costs related to the variable interest entity as of January 31, 2015)	5,189,000	6,518,000
Goodwill	22,887,000	18,476,000
Intangible assets, net of accumulated amortization	1,863,000	1,845,000
TOTAL ASSETS	380,058,000	391,193,000
CURRENT LIABILITIES
Accounts payable	32,392,000	37,691,000
Accrued expenses	24,022,000	15,976,000
Billings in excess of costs and estimated earnings	114,587,000	161,564,000
Deferred income taxes	656,000	201,000
TOTAL CURRENT LIABILITIES	171,657,000	215,432,000
Deferred income taxes	821,000	809,000
TOTAL LIABILITIES	$ 172,478,000	$ 216,241,000
COMMITMENTS AND CONTINGENCIES (Note 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; 14,792,702 and 14,634,434 shares issued at July 31 and January 31, 2015, respectively; 14,789,469 and 14,631,201 shares outstanding at July 31 and January 31, 2015, respectively	$ 2,219,000	$ 2,195,000
Additional paid-in capital	115,621,000	109,696,000
Retained earnings	92,418,000	73,614,000
Treasury stock, at cost - 3,233 shares at July 31 and January 31, 2015	(33,000)	(33,000)
TOTAL STOCKHOLDERS' EQUITY	210,225,000	185,472,000
Noncontrolling interests (Note 3)	(2,645,000)	(10,520,000)
TOTAL EQUITY	207,580,000	174,952,000
TOTAL LIABILITIES AND EQUITY	$ 380,058,000	$ 391,193,000