CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($)	Jun. 30, 2018	Dec. 31, 2017
CURRENT ASSETS:
Cash and cash equivalents	$ 1,134,285	$ 2,184,259
Accounts receivable, net of allowance for doubtful accounts	11,120,231	12,721,521
Inventories, net	10,290,471	10,118,394
Prepaid expenses	1,056,659	1,200,834
Other current assets	1,139,668	732,960
Total Current Assets	24,741,314	26,957,968
Property, plant and equipment, net	102,698,557	100,598,639
Deposits on equipment	3,845,775	4,370,922
Other assets	2,094,846	1,972,805
Total Assets	133,380,492	133,900,334
CURRENT LIABILITIES:
Accounts payable	10,518,831	9,173,169
Accrued expenses	5,554,830	7,519,348
Borrowings under Credit Facilities	4,000,000	0
Total Current Liabilities	20,073,661	16,692,517
Other liabilities	289,845	304,839
Total Liabilities	20,363,506	16,997,356
STOCKHOLDERS' EQUITY:
Common stock — voting, $0.001 par value, 200,000,000 shares authorized, 35,317,520 issued and 35,303,351 outstanding on June 30, 2018, and 35,132,548 issued and outstanding on December 31, 2017	35,317	35,132
Additional paid-in capital	316,176,333	312,783,195
Accumulated deficit	(203,012,934)	(195,991,478)
Accumulated other comprehensive income	74,496	76,129
Treasury stock, at cost — 14,169 shares on June 30, 2018 and no shares on December 31, 2017	(256,226)
Total Stockholders' Equity	113,016,986	116,902,978
Total Liabilities and Stockholders' Equity	$ 133,380,492	$ 133,900,334