Stock-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2019

Share-based Payment Arrangement [Abstract]

Schedule of Stock Option Valuation Assumptions

The fair value of each option award is estimated on the date of grant utilizing the Black-Scholes option-pricing formula and the assumptions noted in the following table. Expected volatilities and risk-free interest rates are based upon the expected life of the grant.

Assumptions	2019		2018
Expected dividends	0	%	0	%
Risk free rate	1.38 - 2.47%		2.44	%
Expected volatility	64.33 - 76.81%		52.7 - 72.5%
Expected term (in years)	3.2 – 3.3 years		3.2 – 3.3 years

Schedule of Stock Option Transactions

Stock option transactions in each of the past two years under the aforementioned plans in total were: 

	Shares	Exercise Price Per Share	Weighted Average Exercise Price
January 1, 2018 shares issuable under options	4,299,810	$0.79 - $10.67	$	5.09
Granted	839,785	1.73-4.25	3.34
Exercised	(239,000)	1.02-1.83	1.05
Expired	—	—	—
Forfeited	(548,204)	2.02-10.67	8.04
December 31, 2018 shares issuable under options	4,352,391	$0.79-$10.67	$	4.61
Granted	2,468,129	$0.55-$1.80	0.61
Exercised	—	—	—
Expired	(761,780)	$1.02-$10.67	2.42
Forfeited	(891,001)	$0.66-$8.67	1.04
December 31, 2019 shares issuable under options	5,167,739	$0.55-$10.67	$	3.34

Schedule of Outstanding and Exercisable Stock Options

The following table summarizes information concerning outstanding and exercisable options as of December 31, 2019:

	Options Outstanding				Options Exercisable
Range of Exercise Price	Number of Options	Weighted Average Remaining Life (Years)	Weighted Average Exercise Price		Number of Options	Weighted Average Exercise Price
$0.00 - $0.78	195,155	9.58	$	0.65	—	$	—
$0.79 - $1.50	1,781,369	4.52	1.02		1,265,000	1.03
$1.51 - $5.50	1,884,517	8.25	2.27		482,288	3.30
$5.51 - $10.67	1,306,698	5.97	8.44		1,250,518	7.73
Total	5,167,739	6.44	$	3.34	2,997,806	$	4.49

The following table summarizes information concerning outstanding and exercisable options as of December 31, 2018:

	Options Outstanding				Options Exercisable
Range of Exercise Price	Number of Options	Weighted Average Remaining Life (Years)	Weighted Average Exercise Price		Number of Options	Weighted Average Exercise Price
$0.79 - $1.50	1,510,000	3.12	$	1.06	1,510,000	$	1.06
$1.51 - $5.50	992,457	8.27	3.23		199,826	2.76
$5.51 - $10.67	1,849,934	6.99	8.24		1,528,686	8.45
Total	4,352,391	5.94	$	4.61	3,238,512	$	4.65

Nonvested Stock Option Activity

A summary of non-vested options at December 31, 2019 and changes during the year ended December 31, 2019 is presented below: 

	Options	Weighted Average Grant Date Fair Value
Non-vested options at January 1, 2019	1,113,878	$	2.00
Granted	2,468,129	0.61
Vested	(521,073)	2.20
Forfeited	(891,001)	1.04
Non-vested options at December 31, 2019	2,169,933	$	0.77

Schedule of Nonvested Shares of Restricted Stock

A summary of non-vested RSUs and changes during each of the past two years is as follows:

	Number of RSUs	Weighted Average Issuance Price
Non-vested balance at January 1, 2018	188,629	$8.27
Changes during the period:
Shares granted	122,949	3.36
Shares vested	(109,940)	8.95
Shares forfeited	(26,047)	5.76
Non-vested balance at December 31, 2018	175,591	$4.78
Changes during the period:
Shares granted	—	—
Shares vested	(76,206)	5.39
Shares forfeited	(36,705)	4.74
Non-vested balance at December 31, 2019	62,680	$4.07