CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
CASH FLOWS FROM OPERATING ACTIVITIES:
Net loss	$ (1,385,902)	$ (704,670)	$ (923,634)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization	4,204,112	4,524,879	4,452,272
Stock-based compensation expense	177,679	229,093	364,880
Provision for doubtful accounts	833,271	811,528	873,269
Benefit from deferred income taxes	(792,477)	(369,484)	(421,305)
Change in fair value of contingent liabilities	0	(100,000)	0
Loss (gain) on sale of assets	0	(3,948)	9,220
Changes in assets and liabilities:
Accounts receivable	(1,001,806)	(670,047)	(808,086)
Prepaid expenses and other assets	(183,979)	(55,583)	(65,029)
Deferred charges and other assets	0	5,112	4,808
Accounts payable	(197,525)	8,836	363,922
Accrued expenses	(212,696)	(10,209)	(85,266)
Accrued payroll and related expenses	(165,640)	(181,555)	319,458
Income taxes payable (receivable)	73,878	(80,516)	183,573
Other long-term obligations	132,101	2,921	80,674
Net cash provided by operating activities	1,481,016	3,406,357	4,348,756
CASH FLOWS FROM INVESTING ACTIVITIES:
Note receivable	23,951	27,927	26,572
Capital expenditures	(830,970)	(2,231,032)	(4,730,059)
Proceeds from sale of assets	0	5,000	19,275
Net cash used in investing activities	(807,019)	(2,198,105)	(4,684,212)
CASH FLOWS USED IN FINANCING ACTIVITIES:
Advances - line of credit	23,027,293	27,570,954	27,809,707
Repayments - line of credit	(22,383,865)	(27,196,829)	(26,068,044)
Repayments - reducing revolving loan	(1,000,000)	0	0
Proceeds from exercise of Common Stock options	0	7,671	64,500
Purchase and retirement of Common Stock	(8,860)	0	(6,293)
Tax benefit (expense) of Common Stock options exercised	0	(4,638)	11,211
Common Stock cash dividends	(409,443)	(1,636,838)	(1,635,223)
Net cash provided by (used in) financing activities	(774,875)	(1,259,680)	175,858
NET CHANGE IN CASH	(100,878)	(51,428)	(159,598)
CASH, beginning of year	258,801	310,229	469,827
CASH, end of year	157,923	258,801	310,229
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION:
Cash paid during the year for interest	287,958	155,159	133,686
Cash paid during the year for income taxes	50,906	138,535	16,266
Cash received during the year for income taxes	86,280	4,929	192,491
NON-CASH ITEMS:
Repayments - line of credit with Compass Bank	$ 10,617,598	$ 0	$ 0