Consolidated Statement of Cash Flows - USD ($)	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income (Loss)	$ 3,251,111	$ 1,495,941
Adjustments to reconcile net income (Loss) to net cash provided by operating activities:
Depreciation and amortization	1,379,422	1,857,590
Loss on disposal of fixed assets		21,552
Stock compensation expense	298,579	71,004
Change in assets and liabilities:
Receivables	5,044,241	2,366,282
Inventories	471,100	349,052
Other current assets	(242,353)	(265,791)
Other assets	7,685	6,839
Accounts payable	1,238,002	2,922,946
Accrued and other liabilities	(582,941)	409,138
Net cash provided by operating activities	10,864,846	9,234,553
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchase of fixed assets	(1,415,478)	(866,152)
Proceeds from sales of fixed assets		6,081
Net cash used in investing activities	(1,415,478)	(860,071)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from revolving credit facility	156,770	12,563,546
Repayments on revolving credit facility	(2,356,193)	(21,907,554)
Dividends paid on common stock	(814,858)	(817,901)
Net cash used in financing activities	(3,014,281)	(10,161,909)
(DECREASE) INCREASE IN CASH AND CASH	6,435,087	(1,787,427)
CASH AND CASH EQUIVALENTS:
BEGINNING OF PERIOD	3,680,776	4,480,505
END OF PERIOD	$ 10,115,863	$ 2,693,078