Condensed Consolidated Balance Sheets (USD $)	Jul. 31, 2013	Jan. 31, 2013
CURRENT ASSETS:
Cash and cash equivalents	$ 152,917,000	$ 175,142,000
Accounts receivable, net of allowance for doubtful accounts	15,101,000	24,879,000
Notes receivable from variable interest entities and accrued interest	9,691,000
Costs and estimated earnings in excess of billings	509,000	1,178,000
Deferred income tax assets	133,000	1,303,000
Prepaid expenses and other current assets	3,231,000	1,606,000
TOTAL CURRENT ASSETS	181,582,000	204,108,000
Property, plant and equipment, net ($5,309,000 in costs related to variable interest entities as of January 31, 2013, Note 2)	4,188,000	9,468,000
Goodwill	18,476,000	18,476,000
Intangible assets, net of accumulated amortization	2,210,000	2,331,000
Deferred income tax and other assets	292,000	341,000
TOTAL ASSETS	206,748,000	234,724,000
CURRENT LIABILITIES:
Accounts payable	17,510,000	32,699,000
Accrued expenses	8,026,000	9,488,000
Billings in excess of costs and estimated earnings	40,075,000	73,359,000
TOTAL CURRENT LIABILITIES	65,611,000	115,546,000
Other liabilities	6,000	10,000
TOTAL LIABILITIES	65,617,000	115,556,000
COMMITMENTS AND CONTINGENCIES (Note 12)
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; 14,020,284 and 13,977,560 shares issued at July 31 and January 31, 2013, respectively; 14,017,051 and 13,974,327 shares outstanding at July 31 and January 31, 2013, respectively"	2,103,000	2,096,000
Additional paid-in capital	96,098,000	95,004,000
Retained earnings	42,884,000	23,850,000
Treasury stock, at cost - 3,233 shares at July 31 and January 31, 2013	(33,000)	(33,000)
TOTAL STOCKHOLDERS' EQUITY	141,052,000	120,917,000
Noncontrolling interests (Note 2)	79,000	(1,749,000)
TOTAL EQUITY	141,131,000	119,168,000
TOTAL LIABILITIES AND EQUITY	$ 206,748,000	$ 234,724,000