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Summary of Quarterly Results of Operations - Summary of Unaudited Quarterly Results of Operations (Detail) (USD $)	3 Months Ended												12 Months Ended
	Mar. 31, 2015		Dec. 31, 2014		Sep. 30, 2014		Jun. 30, 2014		Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2015	Mar. 31, 2014
Quarterly Financial Information Disclosure [Abstract]
Net sales	$ 25,321,149us-gaap_SalesRevenueGoodsNet		$ 23,552,636us-gaap_SalesRevenueGoodsNet		$ 31,544,474us-gaap_SalesRevenueGoodsNet		$ 27,904,521us-gaap_SalesRevenueGoodsNet		$ 31,981,813us-gaap_SalesRevenueGoodsNet	$ 28,274,696us-gaap_SalesRevenueGoodsNet	$ 26,310,369us-gaap_SalesRevenueGoodsNet	$ 29,582,144us-gaap_SalesRevenueGoodsNet	$ 108,322,780us-gaap_SalesRevenueGoodsNet	$ 116,149,022us-gaap_SalesRevenueGoodsNet
Gross profit	356,281us-gaap_GrossProfit		1,258,797us-gaap_GrossProfit		2,420,929us-gaap_GrossProfit		1,042,061us-gaap_GrossProfit		1,693,948us-gaap_GrossProfit	1,846,778us-gaap_GrossProfit	1,077,913us-gaap_GrossProfit	2,443,844us-gaap_GrossProfit
Net earnings	$ (452,718)us-gaap_NetIncomeLoss		$ 187,643us-gaap_NetIncomeLoss		$ 765,655us-gaap_NetIncomeLoss		$ (118,250)us-gaap_NetIncomeLoss		$ 389,440us-gaap_NetIncomeLoss	$ 487,468us-gaap_NetIncomeLoss	$ 27,659us-gaap_NetIncomeLoss	$ 808,359us-gaap_NetIncomeLoss	$ 382,330us-gaap_NetIncomeLoss	$ 1,712,926us-gaap_NetIncomeLoss
Basic	$ (0.07)us-gaap_EarningsPerShareBasic	[1]	$ 0.03us-gaap_EarningsPerShareBasic	[1]	$ 0.11us-gaap_EarningsPerShareBasic	[1]	$ (0.02)us-gaap_EarningsPerShareBasic	[1]	$ 0.06us-gaap_EarningsPerShareBasic	$ 0.07us-gaap_EarningsPerShareBasic	$ 0.00us-gaap_EarningsPerShareBasic	$ 0.12us-gaap_EarningsPerShareBasic	$ 0.06us-gaap_EarningsPerShareBasic	$ 0.25us-gaap_EarningsPerShareBasic
Diluted	$ (0.07)us-gaap_EarningsPerShareDiluted	[1]	$ 0.03us-gaap_EarningsPerShareDiluted	[1]	$ 0.11us-gaap_EarningsPerShareDiluted	[1]	$ (0.02)us-gaap_EarningsPerShareDiluted	[1]	$ 0.06us-gaap_EarningsPerShareDiluted	$ 0.07us-gaap_EarningsPerShareDiluted	$ 0.00us-gaap_EarningsPerShareDiluted	$ 0.12us-gaap_EarningsPerShareDiluted	$ 0.06us-gaap_EarningsPerShareDiluted	$ 0.25us-gaap_EarningsPerShareDiluted
[1] The sum of the quarterly earnings per share does not equal the annual amount reported due to per share amounts being calculated independently for each quarter.

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The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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