Common Stock (Tables)

12 Months Ended

Dec. 31, 2017

A reconciliation of the changes in common shares issued is as follows:



	Year ended December 31,
	2017	2016
Shares issued at the beginning of the year	59,684,669	56,220,214
Issued in sale of common stock	—	2,450,339
Issued in acquisition	—	247,764
Issued in payment of accrued liability	—	20,000
Issued as restricted stock award grants	275,029	632,240
Issued upon exercise of stock options	663,288	114,112
Shares issued at the end of the year	60,622,986	59,684,669

Stock option activity for the year ended December 31, 2017 is as follows:



Options	Shares		Weighted-Average Exercise Price		Weighted-Average Remaining Contractual Term (in years)	Aggregate Intrinsic Value
Outstanding as of January 1, 2017	663,288		$	8.87
Exercised	(663,288	)	8.87
Forfeited	—		—
Expired	—		—
Outstanding as of December 31, 2017	—		$	—	0.00	$	—

Restricted stock share activity for the year ended December 31, 2017 is as follows:



Restricted Stock Shares	Shares		Weighted- Average Fair Value at Date of Grant
Non-vested at January 1, 2017	683,242		$	15.92
Granted to employees	260,029		10.62
Granted to service provider	15,000		9.34
Vested	(590,027	)	14.63
Forfeited	(121,986	)	17.48
Non-vested at December 31, 2017	246,258		$	12.24

Restricted stock unit share activity for the year ended December 31, 2017 is as follows:



Restricted Stock Unit Shares	Shares		Weighted- Average Fair Value at Date of Grant
RSU share equivalents at January 1, 2017	768,393		$	12.02
2016 share equivalents forfeited	(263,585	)	12.02
2016 share equivalents not earned	(252,403	)	12.02
2016 share equivalents	252,405		12.02
2017 share equivalents granted	604,682		18.70
2017 share equivalents forfeited	(131,756	)	18.48
RSU share equivalents at December 31, 2017	725,331		$	16.41