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CONSOLIDATED BALANCE SHEETS (USD $)
Jun. 30, 2013
Dec. 31, 2012
CURRENT ASSETS    
Cash and cash equivalents $ 24,806,819 $ 8,614,244
Trade accounts receivable 14,812,840 35,640,758
Cost and estimated earnings in excess of billings on uncompleted contracts 1,025,784 6,263,943
Prepaid expenses and other 4,325,313 1,824,779
Total current assets 44,970,756 52,343,724
PROPERTY AND EQUIPMENT - at cost    
Machinery and equipment 186,932,139 190,943,331
Automobiles and trucks 14,947,148 15,265,627
Furniture and fixtures 488,067 488,779
Leasehold improvements 14,994 14,994
Total property and equipment, gross 202,382,348 206,712,731
Less accumulated depreciation and amortization (128,160,720) (117,326,964)
Total property and equipment, net 74,221,628 89,385,767
Goodwill 201,530 201,530
Other assets 95,271 96,817
Total noncurrent assets 296,801 298,347
Total assets 119,489,185 142,027,838
CURRENT LIABILITIES    
Trade accounts payable 3,156,367 13,680,538
Accrued liabilities 2,844,134 5,544,071
Billings in excess of costs and estimated earnings on uncompleted contracts 2,035,576 3,757,349
Federal and state income taxes payable 2,315,249 4,569,891
Current maturities of notes payable 11,707,143 10,615,279
Current portion of capital lease obligations 1,685,460 1,960,503
Total current liabilities 23,743,929 40,127,631
NOTES PAYABLE, less current maturities 10,086,494 14,412,598
CAPITAL LEASE OBLIGATIONS, less current portion 1,365,631 1,884,937
LONG-TERM DEFERRED TAX LIABILITY 5,755,431 7,617,111
SHAREHOLDERS' EQUITY    
Preferred stock, $1.00 par value; 4,000,000 shares authorized; issued - none      
Common stock, $.01 par value; 35,000,000 and 25,000,000 shares authorized; 21,947,790 and 20,732,500 shares issued and outstanding in each period 219,478 207,325
Additional paid-in capital 30,799,678 29,573,986
Retained earnings 50,420,999 48,073,556
Treasury stock, at cost, 97,816 and 80,076 shares in each period (874,973) (691,009)
Accumulated other comprehensive income (loss) - foreign currency translation adjustments (2,027,482) 821,703
Total shareholders' equity 78,537,700 77,985,561
Total liabilities and shareholders' equity $ 119,489,185 $ 142,027,838