Condensed Consolidated Statements of Income (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Condensed Consolidated Statements of Income [Abstract]
Net sales	$ 58,995,918	$ 83,221,544	$ 156,053,109	$ 195,260,160
Cost of sales	48,862,015	68,653,106	129,279,758	161,636,596
Gross profit	10,133,903	14,568,438	26,773,351	33,623,564
Operating expenses:
Selling expenses	9,879,874	12,417,898	23,204,087	27,548,786
General and administrative expenses	2,080,136	2,089,501	4,598,472	4,465,275
Total operating expenses	11,960,010	14,507,399	27,802,559	32,014,061
Income (loss) from operations	(1,826,107)	61,039	(1,029,208)	1,609,503
Non-operating income (expense):
Interest income	261,991	78,243	455,564	104,771
Interest expense	(226,280)	(101,739)	(523,888)	(395,648)
Total non-operating income (expense)	35,711	(23,496)	(68,324)	(290,877)
Income (loss) before income taxes	(1,790,396)	37,543	(1,097,532)	1,318,626
Income taxes	(336,185)	27,932	(46,591)	478,414
Net income (loss)	(1,454,211)	9,611	(1,050,941)	840,212
Comprehensive income statement:
Net income (loss)	(1,454,211)	9,611	(1,050,941)	840,212
Foreign currency translation adjustment	447,273	88,676	1,633,053	951,153
Comprehensive income (loss)	$ (1,006,938)	$ 98,287	$ 582,112	$ 1,791,365
Weighted average number of shares outstanding:
Basic	1,522,326	1,312,531	1,516,140	1,309,296
Diluted	1,522,326	1,543,304	1,516,140	1,543,319
Earnings (losses) per share:
Basic	$ (0.955)	$ 0.006	$ (0.693)	$ 0.547
Diluted	$ (0.955)	$ 0.006	$ (0.693)	$ 0.544