Summary of Common Stock Shares Activity |
The following table summarizes common stock share activity for the three and nine months ended September 30, 2021 and 2020 (dollars in thousands):
|
|
Three Months Ended September 30, 2021
|
|
|
|
Shares of
Common Stock
|
|
|
Common
Stock
|
|
|
Additional
Paid-in
Capital
|
|
|
Accumulated
Deficit
|
|
|
Total
Stockholders’
Equity
|
|
Balance, June 30, 2021
|
|
|
23,147,552
|
|
|
$
|
26
|
|
|
$
|
361,925
|
|
|
$
|
(329,631
|
)
|
|
$
|
32,320
|
|
Net loss
|
|
|
—
|
|
|
|
—
|
|
|
|
—
|
|
|
|
(605
|
)
|
|
|
(605
|
)
|
Stock-based compensation expense
|
|
|
—
|
|
|
|
—
|
|
|
|
588
|
|
|
|
—
|
|
|
|
588
|
|
Common stock issued through employee stock purchase
|
|
|
2,759
|
|
|
|
—
|
|
|
|
13
|
|
|
|
—
|
|
|
|
13
|
|
Common stock issued, net of expenses
|
|
|
733,937
|
|
|
|
1
|
|
|
|
5,300
|
|
|
|
—
|
|
|
|
5,301
|
|
Common stock issued for vested restricted stock units
|
|
|
1,322
|
|
|
|
—
|
|
|
|
(3
|
)
|
|
|
—
|
|
|
|
(3
|
)
|
Balance, September 30, 2021
|
|
|
23,885,570
|
|
|
$
|
27
|
|
|
$
|
367,823
|
|
|
$
|
(330,236
|
)
|
|
$
|
37,614
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Nine Months September 30, 2021
|
|
|
|
Shares of
Common Stock
|
|
|
Common
Stock
|
|
|
Additional
Paid-in
Capital
|
|
|
Accumulated
Deficit
|
|
|
Total
Stockholders’
Equity
|
|
Balance, December 31, 2020
|
|
|
19,663,698
|
|
|
$
|
20
|
|
|
$
|
349,351
|
|
|
$
|
(326,613
|
)
|
|
$
|
22,758
|
|
Net loss
|
|
|
—
|
|
|
|
—
|
|
|
|
—
|
|
|
|
(3,623
|
)
|
|
|
(3,623
|
)
|
Stock-based compensation expense
|
|
|
—
|
|
|
|
—
|
|
|
|
1,528
|
|
|
|
—
|
|
|
|
1,528
|
|
Common stock issued through employee stock purchase
|
|
|
4,943
|
|
|
|
—
|
|
|
|
22
|
|
|
|
—
|
|
|
|
22
|
|
Common stock issued, net of expenses
|
|
|
3,250,739
|
|
|
|
6
|
|
|
|
8,707
|
|
|
|
—
|
|
|
|
8,713
|
|
Common stock issued for conversion of April 2020 Notes
|
|
|
959,080
|
|
|
|
1
|
|
|
|
7,452
|
|
|
|
—
|
|
|
|
7,453
|
|
Common stock issued for vested restricted stock units
|
|
|
7,110
|
|
|
|
—
|
|
|
|
(3
|
)
|
|
|
—
|
|
|
|
(3
|
)
|
Vested Loan Agreement warrants
|
|
|
—
|
|
|
|
—
|
|
|
|
766
|
|
|
|
—
|
|
|
|
766
|
|
Balance, September 30, 2021
|
|
|
23,885,570
|
|
|
$
|
27
|
|
|
$
|
367,823
|
|
|
$
|
(330,236
|
)
|
|
$
|
37,614
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Three Months Ended September 30, 2020
|
|
|
|
Shares of
Common Stock
|
|
|
Common
Stock
|
|
|
Additional
Paid-in
Capital
|
|
|
Accumulated
Deficit
|
|
|
Total
Stockholders’
Equity
|
|
Balance, June 30, 2020
|
|
|
10,478,927
|
|
|
$
|
10
|
|
|
$
|
291,134
|
|
|
$
|
(284,811
|
)
|
|
$
|
6,333
|
|
Net loss
|
|
|
—
|
|
|
|
—
|
|
|
|
—
|
|
|
|
909
|
|
|
|
909
|
|
Stock-based compensation expense
|
|
|
—
|
|
|
|
—
|
|
|
|
399
|
|
|
|
—
|
|
|
|
399
|
|
Common stock issued, net of expenses
|
|
|
315,939
|
|
|
|
—
|
|
|
|
1,909
|
|
|
|
—
|
|
|
|
1,909
|
|
Common stock issued through employee stock purchase plan
|
|
|
2,284
|
|
|
|
—
|
|
|
|
9
|
|
|
|
—
|
|
|
|
9
|
|
Common stock issued for vested restricted stock units
|
|
|
969
|
|
|
|
—
|
|
|
|
(1
|
)
|
|
|
—
|
|
|
|
(1
|
)
|
Balance, September 30, 2020
|
|
|
10,798,119
|
|
|
$
|
10
|
|
|
$
|
293,450
|
|
|
$
|
(283,902
|
)
|
|
$
|
9,558
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Nine Months Ended September 30, 2020
|
|
|
|
Shares of
Common Stock
|
|
|
Common
Stock
|
|
|
Additional
Paid-in
Capital
|
|
|
Accumulated
Deficit
|
|
|
Total
Stockholders’
Equity
|
|
Balance, December 31, 2019
|
|
|
9,741,372
|
|
|
$
|
10
|
|
|
$
|
284,313
|
|
|
$
|
(271,428
|
)
|
|
$
|
12,895
|
|
Net loss
|
|
|
—
|
|
|
|
—
|
|
|
|
—
|
|
|
|
(12,474
|
)
|
|
|
(12,474
|
)
|
Stock-based compensation expense
|
|
|
—
|
|
|
|
—
|
|
|
|
1,220
|
|
|
|
—
|
|
|
|
1,220
|
|
Common stock issued through employee stock purchase plan and stock option plans
|
|
|
4,652
|
|
|
|
—
|
|
|
|
28
|
|
|
|
—
|
|
|
|
28
|
|
Common stock issued, net of expenses
|
|
|
647,504
|
|
|
|
—
|
|
|
|
4,578
|
|
|
|
—
|
|
|
|
4,578
|
|
Common stock issued for conversion of April 2020 Notes
|
|
|
316,461
|
|
|
|
—
|
|
|
|
2,784
|
|
|
|
—
|
|
|
|
2,784
|
|
Common stock issued for commitment shares
|
|
|
70,910
|
|
|
|
—
|
|
|
|
602
|
|
|
|
—
|
|
|
|
602
|
|
Common stock issued for vested restricted stock units
|
|
|
17,220
|
|
|
|
—
|
|
|
|
(75
|
)
|
|
|
—
|
|
|
|
(75
|
)
|
Balance, September 30, 2020
|
|
|
10,798,119
|
|
|
$
|
10
|
|
|
$
|
293,450
|
|
|
$
|
(283,902
|
)
|
|
$
|
9,558
|
|
|
Common Stock Reserved For Future Issuances |
The Company had reserved shares of common stock for future issuance as follows:
|
|
September 30, 2021
|
|
|
December 31, 2020
|
|
Outstanding stock options
|
|
|
1,643,506
|
|
|
|
830,343
|
|
Outstanding restricted stock units
|
|
|
149,134
|
|
|
|
29,087
|
|
Warrants to purchase common stock associated with June 2016 Public Offering
|
|
|
—
|
|
|
|
421,867
|
|
Warrants to purchase common stock associated with March 2018 Public Offering – Series 2
|
|
|
798,810
|
|
|
|
798,810
|
|
Warrants to purchase common stock associated with December 2019 Public Offering
|
|
|
4,472,205
|
|
|
|
4,472,205
|
|
Warrants to purchase common stock associated with December 2020 Public Offering - Series 1
|
|
|
6,439,866
|
|
|
|
6,800,000
|
|
Warrants to purchase common stock associated with December 2020 Public Offering - Series 2
|
|
|
6,800,000
|
|
|
|
6,800,000
|
|
Prefunded warrants to purchase common stock associated with December 2020 Public Offering
|
|
|
3,200,000
|
|
|
|
5,260,000
|
|
Warrants to purchase common stock associated with Loan Agreement
|
|
|
170,410
|
|
|
|
—
|
|
Warrants to purchase common stock associated with Solar loan agreement
|
|
|
—
|
|
|
|
12,243
|
|
For possible future issuance for the conversion of the March 2019 Notes
|
|
|
1,138,200
|
|
|
|
1,138,200
|
|
For possible future issuance for the conversion of the April 2020 Notes
|
|
|
—
|
|
|
|
1,299,790
|
|
For possible future issuance under 2014 Plan (Note 8)
|
|
|
184,497
|
|
|
|
146,488
|
|
For possible future issuance under Employee Stock Purchase Plan
|
|
|
3,893
|
|
|
|
5,895
|
|
For possible future issuance under 2015 Plan (Note 8)
|
|
|
231,450
|
|
|
|
14,050
|
|
Total common shares reserved for future issuance
|
|
|
25,231,971
|
|
|
|
28,028,978
|
|
|