Condensed Consolidated Balance Sheets (USD $)	Apr. 30, 2013	Jan. 31, 2013
CURRENT ASSETS:
Cash and cash equivalents	$ 169,387,000	$ 175,142,000
Accounts receivable, net of allowance for doubtful accounts	19,392,000	24,879,000
Costs and estimated earnings in excess of billings	1,062,000	1,178,000
Deferred income tax assets	1,095,000	1,303,000
Prepaid expenses and other current assets	6,096,000	1,606,000
TOTAL CURRENT ASSETS	197,032,000	204,108,000
Property, plant and equipment, net ($3,248,000 and $5,309,000 related to variable interest entities as of April 30 and January 31, 2013, respectively)	7,399,000	9,468,000
Goodwill	18,476,000	18,476,000
Intangible assets, net of accumulated amortization	2,270,000	2,331,000
Deferred income tax and other assets	409,000	341,000
TOTAL ASSETS	225,586,000	234,724,000
CURRENT LIABILITIES:
Accounts payable	28,474,000	32,699,000
Accrued expenses	9,075,000	9,488,000
Billings in excess of costs and estimated earnings	61,485,000	73,359,000
TOTAL CURRENT LIABILITIES	99,034,000	115,546,000
Other liabilities	8,000	10,000
TOTAL LIABILITIES	99,042,000	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; 13,977,560 shares issued at April 30 and January 31, 2013; 13,974,327 shares outstanding at April 30 and January 31, 2013	2,096,000	2,096,000
Additional paid-in capital	95,440,000	95,004,000
Retained earnings	30,260,000	23,850,000
Treasury stock, at cost - 3,233 shares at April 30 and January 31, 2013	(33,000)	(33,000)
TOTAL STOCKHOLDERS' EQUITY	127,763,000	120,917,000
Noncontrolling interests (variable interest entities, Note 2)	(1,219,000)	(1,749,000)
TOTAL EQUITY	126,544,000	119,168,000
TOTAL LIABILITIES AND EQUITY	$ 225,586,000	$ 234,724,000