Consolidated Statements of Cash Flows - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 6,402,405	$ 7,706,921	$ 7,265,717
Adjustments to reconcile net income to net cash provided by operating activities -
Depreciation and amortization	1,567,172	1,436,624	1,194,612
Loss on disposal or abandonment of assets	31,064	18,820	109,222
Non-cash stock-based compensation	145,322	67,818	11,686
Deferred income taxes	289,171	183,490	445,977
Foreign currency translation	(896,928)	(727,664)	(261,908)
Net changes in assets and liabilities, net of effect of business acquisitions:
Accounts receivable-trade	71,848	137,351	60,367
Inventory	(709,047)	(6,574,662)	(438,046)
Prepaid expenses	43,585	260,992	(833,181)
Other current assets	87,561	320,835	(325,143)
Accounts payable-trade	728,158	(629,419)	272,010
Accrued expenses and other liabilities	651,038	(414,368)	(119,916)
Income taxes	(212,449)	(609,026)	158,493
Total adjustments	1,796,495	(6,529,209)	274,173
Net cash provided by operating activities	8,198,900	1,177,712	7,539,890
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchase of property and equipment	(2,164,040)	$ (2,204,190)	$ (3,770,022)
Purchase of intangible property	(10,000)
Proceeds from sale of assets	11,662	$ 20,936	$ 5,343
Decrease (increase) in other assets	295	11,980	(5,264)
Net cash used in investing activities	(2,162,083)	(2,171,274)	$ (3,769,943)
CASH FLOWS FROM FINANCING ACTIVITIES:
Net increase (decrease) in revolving credit loans	(3,500,000)	$ 3,500,000
Proceeds from notes payable and long term debt	3,711,225
Payments on notes payable and long-term debt	(2,143,125)	$ (455,625)	$ (506,250)
Payments on capital lease obligations	(79,890)
Repurchase of common stock (treasury stock)	$ (3,708,862)
Payment of cash dividend		$ (2,549,684)
Proceeds from issuance of common stock	$ 9,920	52,722	$ 113,800
Net cash provided by (used in) financing activities	(5,710,732)	547,413	(392,450)
NET INCREASE (DECREASE) IN CASH	326,085	(446,149)	3,377,497
CASH, beginning of period	10,636,530	11,082,679	7,705,182
CASH, end of period	10,962,615	10,636,530	11,082,679
SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION:
Interest paid during the period	330,004	225,584	206,763
Income tax paid during the period, net of (refunds)	3,743,864	$ 4,604,087	$ 3,348,676
NON-CASH INVESTING ACTIVITIES
Equipment purchased via capital leases arrangements	$ 231,972