Stockholders' Equity (Tables)

9 Months Ended

Sep. 30, 2021

The following table summarizes the activity for stock options and warrants for the nine months ended September 30, 2021:


	Stock Options						Warrants
	Shares	Weighted Average Exercise Price		Weighted Average Remaining Contractual Term (Years)	Aggregate Intrinsic Value (In Thousands)		Shares	Weighted Average Exercise Price		Weighted Average Remaining Contractual Term (Years)	Aggregate Intrinsic Value (In Thousands)
Outstanding at December 31, 2020	963,700	$	14.64	5.86	$	—	2,638,355	$	2.18	4.98	$	—

Changes during the period:
Granted	1,314,790	1.32					19,519,393	2.90
Exercised	(7,250)	3.28					(801,148)	2.19
Forfeited	(19,492)	1.92					—	—
Expired	(109,549)	34.12					—	—
Outstanding at September 30, 2021	2,142,199	$	5.63	8.26	$	—	21,356,600	$	2.84	4.63	$	—
Vested at September 30, 2021 or expected to vest in the future	2,126,167	$	5.65	8.26	$	—	21,356,600	$	2.84	4.63	$	—
Vested at September 30, 2021	1,122,583	$	9.26	7.04	$	—	21,356,600	$	2.84	4.63	$	—

Schedule of Restricted Stock Activity

During the nine months ended September 30, 2021 and 2020, the Company issued restricted stock for services as follows ($ in thousands):


	Nine Months Ended September 30,
	2021		2020
Number of restricted stock issued	612,950		156,184
Value of restricted stock issued	$	878	$	512

Schedule of Restricted Stock Units Activity

During the nine months ended September 30, 2021 and 2020, the Company issued restricted stock units for services as follows ($ in thousands, except share data):


	Nine Months Ended September 30,
	2021		2020
Number of restricted stock units issued	458,245		246,383
Value of restricted stock units issued	$	729	$	743