CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($)	Sep. 30, 2015	Dec. 31, 2014
CURRENT ASSETS:
Cash and cash equivalents	$ 15,250,752	$ 36,259,252
Short-term investments	3,749,205
Accounts receivable, less allowance for doubtful accounts	7,029,355	5,360,400
Inventories, net	6,802,023	7,314,151
Prepaid expenses and other current assets	295,556	1,291,379
Total Current Assets	33,126,891	50,225,182
Property, plant and equipment, net	73,882,133	57,825,961
Deposits on equipment	3,371,873	2,883,234
Other assets	1,575,475	1,527,483
Total Assets	111,956,372	112,461,860
CURRENT LIABILITIES:
Accounts payable	6,715,779	5,423,905
Accrued expenses	2,171,909	2,938,316
Accrued warrants	301,857	706,940
Total Current Liabilities	9,189,545	9,069,161
Total Liabilities	9,189,545	9,069,161
STOCKHOLDERS' EQUITY:
Common stock — voting, $0.001 par value, 200,000,000 shares authorized, 33,512,774 and 33,468,342 issued and outstanding on September 30, 2015 and December 31, 2014, respectively	33,513	33,468
Additional paid-in capital	294,082,039	288,216,882
Accumulated deficit	(191,348,725)	(184,857,651)
Total Stockholders' Equity	102,766,827	103,392,699
Total Liabilities and Stockholders' Equity	$ 111,956,372	$ 112,461,860