Stockholders' Equity (Tables)

6 Months Ended

Jun. 30, 2021

The following table summarizes the activity for stock options and warrants for the six months ended June 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	176,875	1.59					19,519,393	2.90
Exercised	(7,250)	3.28					(801,148)	2.19
Forfeited	(19,492)	1.92					—	—
Expired	(108,624)	34.28					—	—
Outstanding at June 30, 2021	1,005,209	$	10.55	6.63	$	5.1	21,356,600	$	2.84	4.88	$	—
Vested at June 30, 2021 or expected to vest in the future	984,976	$	10.72	6.58	$	4.9	21,356,600	$	2.84	4.88	$	—
Vested at June 30, 2021	743,847	$	13.31	5.82	$	0.7	21,356,600	$	2.84	4.88	$	—

Schedule of Restricted Stock Activity

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


	Six Months Ended June 30,
	2021		2020
Number of restricted stock issued	300,450		156,184
Value of restricted stock issued	$	478	$	512

Schedule of Restricted Stock Units Activity

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


	Six Months Ended June 30,
	2021		2020
Number of restricted stock units issued	458,245		195,320
Value of restricted stock units issued	$	729	$	623