Stock-Based Compensation (Tables)

6 Months Ended

Jun. 30, 2021

Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]

Schedule of total stock-based compensation expense

The Company recognized total stock-based compensation expense during the three and six months ended June 30, 2021 and 2020 as follows (table in thousands):

	Three Months Ended June 30,				Six Months Ended June 30,
	2021		2020		2021		2020
Service-based awards:
Restricted stock units	$	78	$	(4)	$	182	$	234
Stock option awards	344		336		735		776
	422		332		917		1,010
Performance-based awards:
Restricted stock awards	—		—		(390)		—
Restricted stock units	—		(1,197)		—		(1,025)
Stock option awards	11		(596)		(330)		(511)
	11		(1,793)		(720)		(1,536)
Total	$	433	$	(1,461)	$	197	$	(526)

Restricted stock awards

Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]

Schedule of restricted stock award

A summary of the Company’s restricted stock awards during the six months ended June 30, 2021 is as follows:

	Number of Shares	Weighted Average Grant-Date Fair Value
Unvested at January 1, 2021	146,800	$	5.70
Forfeited	(68,500)	$	5.70
Unvested at June 30, 2021	78,300	$	5.70

A summary of the Company’s restricted stock awards during the six months ended June 30, 2020 is as follows:

	Number of Shares	Weighted Average Grant-Date Fair Value
Unvested at January 1, 2020	146,800	$	5.70
Unvested at June 30, 2020	146,800	$	5.70

Restricted stock units - service based awards

Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]

Schedule of restricted stock award

A summary of the Company’s service-based restricted stock units during the six months ended June 30, 2021 is as follows:

	Number of Shares	Weighted Average Grant-Date Fair Value
Unvested at January 1, 2021	265,494	$	2.60
Granted	310,050	0.90
Vested	(221,474)	2.38
Forfeited	(11,466)	4.81
Unvested at June 30, 2021	342,604	$	1.17

A summary of the Company’s service-based restricted stock units during the six months ended June 30, 2020 is as follows:

	Number of Shares	Weighted Average Grant-Date Fair Value
Unvested at January 1, 2020	463,786	$	4.26
Granted	188,904	2.09
Vested	(104,168)	4.66
Forfeited	(128,460)	4.30
Unvested at June 30, 2020	420,062	$	3.27

Restricted stock units - performance based awards

Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]

Schedule of restricted stock award

A summary of the Company’s performance-based restricted stock units during the six months ended June 30, 2020 is as follows:

	Number of Shares	Weighted Average Grant-Date Fair Value
Unvested at January 1, 2020	988,958	$	4.48
Forfeited	(905,625)	4.61
Unvested at June 30, 2020	83,333	$	3.09

Stock option awards - service based awards

Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]

Schedule of stock option assumptions

The fair value of the service-based stock options granted for the six months ended June 30, 2021 were based on the following assumptions:

	June 30, 2021
Exercise price	$0.90 - $0.94
Expected stock price volatility	75.8% - 77.7%
Risk-free interest rate	0.47% - 1.06%
Term (years)	5.5 - 6

Schedule of stock options activity

A summary of the Company’s service-based stock option activity for the six months ended June 30, 2021 is as follows:

	Shares Underlying Options	Weighted Average Exercise Price		Weighted Average Remaining Contractual Term	Aggregate Intrinsic Value
Outstanding at January 1, 2021	5,717,956	$	4.55	6.6	$	—
Granted	1,522,162	0.96		6.0	—
Forfeited	(277,764)	2.52		—	—
Expired	(1,266,553)	7.35		—	—
Outstanding at June 30, 2021	5,695,801	$	3.07	7.8	$	5,000
Exercisable at June 30, 2021	2,387,440	$	5.25	5.8	$	—

A summary of the Company’s service-based stock option activity for the six months ended June 30, 2020 is as follows:

	Shares Underlying Options	Weighted Average Exercise Price		Weighted Average Remaining Contractual Term	Aggregate Intrinsic Value
Outstanding at January 1, 2020	8,210,024	$	7.06	5.1	$	107,000
Granted	1,610,344	2.24		5.9	—
Forfeited	(211,471)	4.41		—	—
Expired	(3,983,335)	8.30		—	—
Outstanding at June 30, 2020	5,625,562	$	4.90	6.7	$	1,000
Exercisable at June 30, 2020	2,809,954	$	7.09	4.3	$	—

Stock option awards - performance based awards

Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]

Schedule of stock options activity

A summary of the performance-based stock options for the six months ended June 30, 2021 is as follows:

	Number of Shares	Weighted Average Exercise Price
Outstanding at January 1, 2021	750,000	$	2.20
Expired	(375,000)	2.20
Outstanding at June 30, 2021	375,000	$	2.20
Exercisable at June 30, 2021	—	$	—

A summary of the performance-based stock options for the six months ended June 30, 2020 is as follows:

	Number of Shares	Weighted Average Exercise Price
Outstanding at January 1, 2020	388,125	$	4.70
Granted	600,000	$	2.45
Forfeited	(388,125)	$	4.70
Outstanding at June 30, 2020	600,000	$	2.45
Exercisable at June 30, 2020	—	$	—