Stock-Based Compensation - (Tables)

9 Months Ended

Sep. 30, 2018

Stock-Based Compensation

Schedule of stock-based compensation expense recognized

	Three Months Ended September 30,				Nine Months Ended September 30,
	2018		2017		2018		2017
Restricted stock awards	$	20,222	$	564,854	$	1,292,125	$	2,751,239
Stock option awards		427,944		1,071,653		967,377		3,275,339
Restricted stock units		166,417		-		166,417		-
	$	614,583	$	1,636,507	$	2,425,919	$	6,026,578

Schedule of restricted stock activity

			Weighted Average
			Grant-Date
	Number of Shares		Fair Value
Granted at December 31, 2017	1,380,000	$	7.27
Granted	-		-
Forfeited	(333,200)		5.70
Granted at September 30, 2018	1,046,800	$	7.77

Schedule of stock option activity

				Weighted
			Weighted	Average
	Shares		Average	Remaining
	Underlying		Exercise	Contractual		Aggregate
	Options		Price	Term		Intrinsic Value
Outstanding at December 31, 2017	6,906,001	$	7.92	5.0
Granted	1,337,271		4.96	9.4
Exercised	(5,000)		6.59	-
Forfeited	(190,167)		6.59	-
Outstanding at September 30, 2018	8,048,105	$	7.46	5.2	$	365,135
Exercisable at September 30, 2018	6,248,160	$	7.90	4.1	$	365,135

Schedule of assumptions used in stock option valuation

	Nine Months Ended September 30,
	2018		2017
Exercise price		$4.52 - $5.75		$6.09
Expected stock price volatility		67.5%		66.3%
Risk-free interest rate		2.7% - 2.9%		2.2%
Term (years)		5.0 - 6.5		5.5 - 6.5