Consolidated Balance Sheets (USD $)	Mar. 31, 2013	Dec. 31, 2012
Current assets
Cash and cash equivalents	$ 2,195,696	$ 7,845,943
Accounts receivable and accrued billings, net	14,842,862	13,288,812
Current portion of notes receivable	53,129	46,919
Construction inventory	15,276	108,974
Real estate inventory	355,019	351,634
Costs and estimated earnings in excess of billings on uncompleted contracts	6,667,243	7,411,544
Deferred income taxes	704,440	773,307
Residential properties under construction	571,783	215,648
Prepaid expenses	1,371,288	974,278
Other current assets	68,256	37,844
Total current assets	26,844,992	31,054,903
Property, buildings and equipment, at cost, net of accumulated depreciation of $24,249,607 in 2013 and $23,152,625 in 2012	29,275,369	23,817,328
Notes receivable, less current portion	140,023	151,861
Deferred charges and other assets
Land and land development costs	1,039,860	1,027,957
Cash surrender value of life insurance	615,027	617,090
Restricted cash	480,819	418,307
Other assets	27,502	31,081
Total deferred charges and other assets	2,163,208	2,094,435
Total assets	58,423,592	57,118,527
Current liabilities
Accounts payable and accrued liabilities	7,429,121	6,637,932
Billings in excess of costs and estimated earnings on uncompleted contracts	95,504	374,052
Current portion of notes payable	4,438,175	4,219,720
Income taxes payable	531,230	1,001,062
Total current liabilities	12,494,030	12,232,766
Deferred income taxes	4,520,691	4,045,820
Other accrued liabilities	10,665	10,556
Notes payable, less current portion	12,309,269	13,535,956
Total liabilities	29,334,655	29,825,098
Commitments and contingencies
Stockholders’ equity
Preferred stock, $1 par value, 5,000,000 shares authorized, none issued
Common stock, $.10 par value, 40,000,000 shares authorized; 27,813,772 shares issued and 25,451,354 shares outstanding	2,781,377	2,781,377
Additional paid-in capital	18,481,683	18,481,683
Retained earnings	9,134,064	7,338,556
Treasury stock, 2,362,418 shares, at cost	(1,308,187)	(1,308,187)
Total stockholders’ equity	29,088,937	27,293,429
Total liabilities and stockholders’ equity	$ 58,423,592	$ 57,118,527