Supplemental disclosure of cash flow information

12 Months Ended

Dec. 31, 2017

24. Supplemental disclosure of cash flow information

	Year Ended December 31,
	2017		2016		2015
Interest paid in cash	$	7,062	$	74,898	$	147,546

Non-cash transactions:
Transfers from inventory to property, plant and equipment and construction in progress	$	291,275	$	276,807	$	123,036
Transfers from construction in progress to property, plant and equipment	$	3,183,122	$	3,542,119	$	2,694,733
Issuance of 34,991, 25,156, and 10,514, respectively, shares of common stock for services rendered	$	402,927	$	278,388	$	119,018
Issuance of 9,441, 8,421, and 8,615, respectively, shares of redeemable preferred stock for services rendered	$	118,485	$	111,410	$	110,703
Conversion (on a one-to-one basis) of 12,214, 11,558, and 7,195, respectively, shares of redeemable preferred stock to common stock	$	7,328	$	6,935	$	4,317
Dividends declared but not paid	$	1,270,950	$	1,118,017	$	1,111,501