Consolidated Balance Sheets - USD ($)	Dec. 31, 2019	Dec. 31, 2018
Current assets
Cash and cash equivalents	$ 23,272,156	$ 11,376,373
Accounts receivable and accrued billings	23,930,655	22,236,071
Costs and estimated earnings in excess of billings on uncompleted contracts	9,321,368	12,030,000
Income taxes receivable	1,482,618	1,220,527
Residential properties under construction	2,060,364	8,244,995
Prepaid expenses	924,733	634,069
Other current assets	46,186	1,835,743
Total current assets	61,038,080	57,577,778
Property, buildings and equipment, at cost, net of accumulated depreciation of $51,904,568 in 2019 and $43,060,083 in 2018	55,073,579	48,927,055
Deferred charges and other assets
Land and land development costs	5,060,581	4,680,080
Cash surrender value of life insurance	543,433	547,009
Restricted cash	0	25,980
Goodwill	101,407	101,407
Intangibles, net of accumulated amortization of $384,801 in 2019 and $324,634 in 2018	628,999	689,166
Operating lease right-of-use assets	6,861,099
Other assets	60,000
Total deferred charges and other assets	13,255,519	6,043,642
Total assets	129,367,178	112,548,475
Current liabilities
Accounts payable and accrued liabilities	13,881,277	15,999,157
Billings in excess of costs and estimated earnings on uncompleted contracts	731,492	1,165,002
Current portion of operating lease liability	1,880,957
Current portion of other long-term debt		113,855
Current portion of notes payable, net	7,769,497	7,161,890
Accrued remediation costs	75,545	60,101
Total current liabilities	24,338,768	24,500,005
Deferred income taxes	9,008,765	6,061,042
Accrued remediation costs, less current portion	398,877	436,982
Other long-term debt, less current portion, net		183,744
Notes payable, less current portion, net	24,402,926	21,731,024
Other accrued liabilities	5,047,088	30,246
Total liabilities	63,196,424	52,943,043
Commitments and contingencies (notes 4 and 8)
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 24,522,534 shares outstanding in 2019 and 24,590,243 shares outstanding in 2018	2,781,377	2,781,377
Additional paid-in capital	18,481,683	18,481,683
Retained earnings	48,347,798	41,621,191
Treasury stock, 3,291,238 shares in 2019 and 3,223,529 shares in 2018, at cost	(3,440,104)	(3,278,819)
Total stockholders’ equity	66,170,754	59,605,432
Total liabilities and stockholders’ equity	$ 129,367,178	$ 112,548,475