CONSOLIDATED STATEMENTS OF OPERATIONS (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
CONSOLIDATED STATEMENTS OF OPERATIONS
Revenue	$ 134,534,540	$ 196,317,215	$ 151,028,582
Cost and expenses
Cost of services	107,675,356	135,279,937	104,022,944
Selling, general and administrative	9,593,068	8,755,270	9,626,679
Depreciation and amortization expense	24,644,190	25,502,597	19,214,069
Total cost and expenses	141,912,614	169,537,804	132,863,692
Income (loss) from operations	(7,378,074)	26,779,411	18,164,890
Interest expense	1,091,476	1,222,454	784,425
Income (loss) before income taxes	(8,469,550)	25,556,957	17,380,465
Income tax expense (benefit):
Current	1,155,204	9,525,543	4,077,297
Deferred	(3,308,713)	359,535	2,469,953
Income tax expense (benefit):	(2,153,509)	9,885,078	6,547,250
Net income (loss)	$ (6,316,041)	$ 15,671,879	$ 10,833,215
Net income (loss) per common share:
Basic (in dollars per share)	$ (0.29)	$ 0.73	$ 0.51
Diluted (in dollars per share)	$ (0.29)	$ 0.72	$ 0.50
Weighted average number of shares outstanding:
Basic (in shares)	21,841,582	21,513,638	21,215,800
Diluted (in shares)	21,841,582	21,898,376	21,548,401