Consolidated Statements of Cash Flows (USD $)	12 Months Ended
	Jan. 31, 2014	Jan. 31, 2013	Jan. 31, 2012
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 43,344,000	$ 21,817,000	$ 8,970,000
Removal of loss (income) on discontinued operations		285,000	(1,562,000)
Income from continuing operations	43,344,000	22,102,000	7,408,000
Adjustments to reconcile income from continuing operations to net cash provided by continuing operating activities:
Gains on the deconsolidation of variable interest entities	(2,444,000)
Non-cash stock compensation expense	1,536,000	1,316,000	637,000
Depreciation	549,000	522,000	455,000
Amortization of purchased intangible assets	243,000	243,000	334,000
Deferred income tax expense (benefit)	1,701,000	(139,000)	(51,000)
Changes in operating assets and liabilities:
Accounts receivable	1,294,000	(8,826,000)	(2,976,000)
Restricted cash			1,243,000
Costs and estimated earnings in excess of billings	722,000	1,603,000	(1,338,000)
Prepaid expenses and other assets	598,000	2,943,000	(4,020,000)
Accounts payable and accrued expenses	(9,937,000)	6,489,000	20,270,000
Billings in excess of costs and estimated earnings	61,377,000	5,389,000	58,088,000
Net cash provided by continuing operating activities	98,983,000	31,642,000	80,050,000
Net cash used in discontinued operating activities		(78,000)	(1,335,000)
Net cash provided by operating activities	98,983,000	31,564,000	78,715,000
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchases of property and equipment, net	(1,136,000)	(7,263,000)	(1,738,000)
Net cash provided by the sale of the assets of VLI			2,528,000
Net cash (used in) provided by investing activities	(1,136,000)	(7,263,000)	790,000
CASH FLOWS FROM FINANCING ACTIVITIES:
Loans to deconsolidated variable interest entities	(2,450,000)
Payments received on loans made to deconsolidated variable interest entities	8,915,000
Deconsolidation of the cash of variable interest entities	(399,000)
Proceeds from the exercise of stock options and conversion of warrants	3,794,000	2,676,000	531,000
Dividends	(10,640,000)	(8,359,000)	(6,804,000)
Net cash used in financing activities	(780,000)	(5,683,000)	(6,273,000)
NET INCREASE IN CASH AND CASH EQUIVALENTS	97,067,000	18,618,000	73,232,000
CASH AND CASH EQUIVALENTS, BEGINNING OF YEAR	175,142,000	156,524,000	83,292,000
CASH AND CASH EQUIVALENTS, END OF YEAR	272,209,000	175,142,000	156,524,000
SUPPLEMENTAL CASH FLOW INFORMATION:
Cash paid for income taxes	$ 24,723,000	$ 9,977,000	$ 5,097,000