CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($)	Jun. 30, 2016	Dec. 31, 2015
CURRENT ASSETS:
Cash and cash equivalents	$ 1,719,089	$ 8,029,413
Short-term investments		3,250,000
Accounts receivable, net of allowance for doubtful accounts	8,226,216	7,030,719
Inventories, net	7,864,626	6,853,447
Prepaid expenses and other current assets	792,129	229,631
Total Current Assets	18,602,060	25,393,210
Property, plant and equipment, net	99,119,154	82,793,007
Deposits on equipment	2,959,216	3,243,519
Other assets	1,781,860	1,667,838
Total Assets	122,462,290	113,097,574
CURRENT LIABILITIES:
Accounts payable	7,397,999	6,668,643
Accrued expenses	4,960,313	2,274,557
Accrued warrants	232,489	204,314
Short-term borrowings under line of credit	8,000,000
Total Current Liabilities	20,590,801	9,147,514
Total Liabilities	20,590,801	9,147,514
STOCKHOLDERS' EQUITY:
Common stock — voting, $0.001 par value, 200,000,000 shares authorized, 33,573,804 and 33,536,940 issued and outstanding on June 30, 2016 and December 31, 2015, respectively	33,573	33,537
Additional paid-in capital	295,421,183	292,484,986
Accumulated deficit	(193,583,267)	(188,568,463)
Total Stockholders' Equity	101,871,489	103,950,060
Total Liabilities and Stockholders' Equity	$ 122,462,290	$ 113,097,574