CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Oct. 31, 2016	Jan. 31, 2016
CURRENT ASSETS
Cash and cash equivalents	$ 170,775	$ 160,909
Short-term investments	275,545	114,098
Accounts receivable, net	42,886	64,185
Costs and estimated earnings in excess of billings	4,642	4,078
Prepaid expenses and other current assets	6,122	7,342
TOTAL CURRENT ASSETS	499,970	350,612
Property, plant and equipment, net	13,435	12,308
Goodwill	34,913	37,405
Intangible assets, net	8,506	9,344
Deferred income taxes	1,980
Other assets	39	122
TOTAL ASSETS	558,843	409,791
CURRENT LIABILITIES
Accounts payable	91,487	46,395
Accrued expenses	38,061	35,454
Billings in excess of costs and estimated earnings	160,985	105,863
TOTAL CURRENT LIABILITIES	290,533	187,712
Deferred income taxes		224
TOTAL LIABILITIES	290,533	187,936
COMMITMENTS AND CONTINGENCIES (Note 10)
STOCKHOLDERS' EQUITY
Preferred stock, par value $0.10 per share - 500 shares authorized; no shares issued and outstanding
Common stock, par value $0.15 per share - 30,000 shares authorized; 15,283 and 14,840 shares issued at October 31 and January 31, 2016, respectively; 15,280 and 14,836 shares outstanding at October 31 and January 31, 2016, respectively	2,292	2,226
Additional paid-in capital	129,970	117,274
Retained earnings	134,298	99,581
Accumulated other comprehensive losses	(757)	(565)
TOTAL STOCKHOLDERS' EQUITY	265,803	218,516
Noncontrolling interests	2,507	3,339
TOTAL EQUITY	268,310	221,855
TOTAL LIABILITIES AND EQUITY	$ 558,843	$ 409,791