CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jan. 31, 2016	Jan. 31, 2015
CURRENT ASSETS
Cash and cash equivalents	$ 160,909	$ 333,691
Short-term investments	114,098
Accounts receivable, net	64,185	27,330
Costs and estimated earnings in excess of billings	4,078	455
Notes receivable and accrued interest, net	1,974	1,786
Deferred income taxes	1,111
Prepaid expenses and other current assets	5,368	1,092
TOTAL CURRENT ASSETS	351,723	364,354
Property, plant and equipment, net	12,308	6,518
Goodwill	37,405	18,476
Intangible assets, net	9,344	1,845
Other assets	122
TOTAL ASSETS	410,902	391,193
CURRENT LIABILITIES
Accounts payable	46,395	37,691
Accrued expenses	35,454	15,976
Billings in excess of costs and estimated earnings	105,863	161,564
Deferred income taxes		201
TOTAL CURRENT LIABILITIES	187,712	215,432
Deferred income taxes	1,335	809
TOTAL LIABILITIES	$ 189,047	$ 216,241
COMMITMENTS AND CONTINGENCIES (Notes 13 and 14)
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; 14,839,702 and 14,634,434 shares issued at January 31, 2016 and 2015, respectively; 14,836,469 and 14,631,201 shares outstanding at January 31, 2016 and 2015, respectively	$ 2,226	$ 2,195
Additional paid-in capital	117,274	109,663
Retained earnings	99,581	73,614
Accumulated other comprehensive loss	(565)
TOTAL STOCKHOLDERS' EQUITY	218,516	185,472
Noncontrolling interests (Note 5)	3,339	(10,520)
TOTAL EQUITY	221,855	174,952
TOTAL LIABILITIES AND EQUITY	$ 410,902	$ 391,193