CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($)	Mar. 31, 2018	Dec. 31, 2017
CURRENT ASSETS:
Cash and cash equivalents	$ 3,039,341	$ 2,184,259
Accounts receivable, net of allowance for doubtful accounts	12,099,217	12,721,521
Inventories, net	9,874,896	10,118,394
Prepaid expenses	819,405	1,200,834
Other current assets	829,446	732,960
Total Current Assets	26,662,305	26,957,968
Property, plant and equipment, net	101,663,419	100,598,639
Deposits on equipment	4,902,977	4,370,922
Other assets	1,997,595	1,972,805
Total Assets	135,226,296	133,900,334
CURRENT LIABILITIES:
Accounts payable	8,466,384	9,173,169
Accrued expenses	5,734,461	7,519,348
Borrowings under Credit Facilities	6,000,000	0
Total Current Liabilities	20,200,845	16,692,517
Other liabilities	297,735	304,839
Total Liabilities	20,498,580	16,997,356
STOCKHOLDERS' EQUITY:
Common stock — voting, $0.001 par value, 200,000,000 shares authorized, 35,139,244 and 35,132,548 issued and outstanding on March 31, 2018 and December 31, 2017, respectively	35,139	35,132
Additional paid-in capital	313,929,310	312,783,195
Accumulated deficit	(199,512,416)	(195,991,478)
Accumulated other comprehensive income	275,683	76,129
Total Stockholders' Equity	114,727,716	116,902,978
Total Liabilities and Stockholders' Equity	$ 135,226,296	$ 133,900,334