Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $)	6 Months Ended
	Jul. 31, 2013	Jul. 31, 2012
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 20,863,000	$ 10,243,000
Removal of loss on discontinued operations		285,000
Income from continuing operations	20,863,000	10,528,000
Adjustments to reconcile income from continuing operations to net cash (used in) provided by continuing operating activities:
Gains on the deconsolidation of variable interest entities	(2,444,000)
Deferred income tax expense	1,214,000	49,000
Stock option compensation expense	759,000	568,000
Depreciation	265,000	249,000
Amortization of purchased intangibles	121,000	121,000
Changes in operating assets and liabilities:
Accounts receivable, net	9,880,000	(6,012,000)
Costs and estimated earnings in excess of billings	740,000	(2,009,000)
Prepaid expenses and other assets	(2,194,000)	1,429,000
Accounts payable and accrued expenses	(15,331,000)	16,337,000
Billings in excess of costs and estimated earnings	(33,284,000)	12,309,000
Net cash (used in) provided by continuing operating activities	(19,411,000)	33,569,000
Net cash used in discontinued operating activities		(78,000)
Net cash (used in) provided by operating activities	(19,411,000)	33,491,000
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchases of property, plant and equipment, net	(851,000)	(3,791,000)
Net cash used in investing activities	(851,000)	(3,791,000)
CASH FLOWS FROM FINANCING ACTIVITIES:
Loans to variable interest entities	(1,713,000)
Deconsolidation of the cash of variable interest entities	(399,000)
Net proceeds from the exercise of stock options and warrants	149,000	610,000
Net cash (used in) provided by financing activities	(1,963,000)	610,000
NET (DECREASE) INCREASE IN CASH AND CASH EQUIVALENTS	(22,225,000)	30,310,000
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	175,142,000	156,524,000
CASH AND CASH EQUIVALENTS, END OF PERIOD	152,917,000	186,834,000
SUPPLEMENTAL CASH FLOW INFORMATION
Cash paid for income taxes	$ 9,385,000	$ 4,026,000