Interim Financial Results (Unaudited) (Details) (USD $)	3 Months Ended								12 Months Ended
	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2010	Sep. 30, 2010	Jun. 30, 2012	Jun. 30, 2011
Summary of selected quarterly financial information
Sales, net	$ 44,604,000	$ 36,212,000	$ 25,284,000	$ 20,083,000	$ 15,041,000	$ 9,975,000	$ 7,460,000	$ 6,443,000	$ 126,182,848	$ 38,919,223
Gross profit	38,177,000	31,223,000	21,604,000	17,127,000	12,917,000	8,393,000	6,269,000	5,423,000	108,130,697	33,001,829
Net income (loss)	$ 4,832,000	$ (4,846,000)	$ 8,759,000	$ 3,724,000	$ (47,187,000)	$ (9,768,000)	$ 5,448,000	$ 715,000	$ 12,469,077	$ (50,791,750)
Per common share:
Basic	$ 0.04	$ (0.05)	$ 0.09	$ 0.04	$ (0.56)	$ (0.13)	$ 0.08	$ 0.01	$ 0.12	$ (0.69)
Diluted	$ 0.04	$ (0.05)	$ 0.05	$ 0.02	$ (0.56)	$ (0.13)	$ 0.00	$ (0.01)	$ 0.11	$ (0.69)