Stockholders' Equity (Tables)

6 Months Ended

Jun. 30, 2018

Stockholders' Equity Note [Abstract]

Share-based Compensation, Stock Options, Activity

Stock option activity for options granted under the 2017 Plan during the six months ended June 30, 2018 is presented in the table below:

	Number of Shares Available		Number of Options Outstanding			Weighted-average Exercise Price		Weighted-average Remaining Contractual Term (years)	Aggregate Intrinsic Value (in Thousands)
Outstanding at July 31, 2017	—		—			—
Total shares authorized	400,000		—			—
Granted	(214,000	)	214,000			$	37.62	9.71
Exercised	—		—			—
Forfeited	40,000		(40,000		)	$	49.93
Balance at December 31, 2017	226,000		174,000			$	34.78	9.71
Annual additional options authorized	101,431		—			—
Granted	(182,550	)	182,550			$	23.80
Exercised	—		—			—
Forfeited	27,000		(27,000		)	$	24.84
Balance at June 30, 2018	171,881		$	329,550		$	29.51	9.42	$	—

Warrant activity for the six months ended June 30, 2018 is presented in the table below:

	Number of Shares		Weighted- average Exercise Price		Weighted- average Remaining Contractual Term (years)	Aggregate Intrinsic Value (in Thousands)
Outstanding at December 31, 2017	357,010		$	9.78	5.57	$	4,708
Exercised	(2,400	)	$	10.00
Outstanding at June 30, 2018	354,610		$	9.78	5.35	$	1,634
Exercisable at June 30, 2018	354,610		$	9.78	5.35	$	1,634

Stock option activity for the Pre-2017 Non-Qualified Stock Options for the six months ended June 30, 2018 is presented in the table below:

	Number of Shares		Weighted- average Exercise Price		Weighted- average Remaining Contractual Term (years)	Aggregate Intrinsic Value (in Thousands)
Outstanding at December 31, 2017	2,980,500		$	7.33	7.06	$	46,606
Exercised	(15,000	)	10.00
Forfeited	—		—
Outstanding at June 30, 2018	2,965,500		$	7.33	6.58	$	20,980
Exercisable at June 30, 2018	2,690,758		$	7.12	6.45	$	19,562

Schedule of Nonvested Share Activity

A summary of the status of the Company’s non-vested options granted under the 2017 Plan as of June 30, 2018 and changes during the six months ended June 30, 2018 are presented in the following table:

	Number of Shares		Weighted Average Grant Date Fair Value Per Share
Non-vested at December 31, 2017	174,000		$	34.78
Granted	182,550		$	23.80
Forfeited	(27,000	)	$	24.84
Balance at June 30, 2018	329,550		$	29.51
Vested	—		—
Non-vested at June 30, 2018	329,550		$	29.51

A summary of the status of the Company’s non-vested Pre-2017 Non-Qualified Stock Options as of June 30, 2018 and changes during the six months ended June 30, 2018 is presented below:

	Number of Options		Weighted Average Grant Date Fair Value
Non-vested at December 31, 2017	288,902		$	7.87
Vested	(14,160	)	$	7.58
Non-vested at June 30, 2018	274,742		$	7.88

Schedule of Assumptions Used in the Valuation

The assumptions used in the valuation of options granted under the 2017 Plan during the six months ended June 30, 2018 are as follows:

	For the Six Months Ended June 30, 2018
Market value of stock on measurement date	$15.56 to $24.84
Risk-free interest rate	2.47% to 2.88%
Dividend yield	—
Volatility factor	121% to 324%
Term	5.5 - 10 Years