| Summary of Common Stock Shares Activity |
The following table summarizes common stock share activity for the three months ended March 31, 2020 and 2019 (dollars in thousands):
|
|
|
Three Months Ended March 31, 2020
|
|
|
|
|
Shares of
Common Stock
|
|
|
Common
Stock
|
|
|
Additional
Paid-in
Capital
|
|
|
Accumulated
Deficit
|
|
|
Total
Stockholders’
Equity
|
|
|
Balance, December 31, 2019
|
|
|
97,413,721
|
|
|
$
|
97
|
|
|
$
|
284,226
|
|
|
$
|
(271,428
|
)
|
|
$
|
12,895
|
|
|
Net loss
|
|
|
—
|
|
|
|
—
|
|
|
|
—
|
|
|
|
(7,002
|
)
|
|
|
(7,002
|
)
|
|
Stock-based compensation expense
|
|
|
—
|
|
|
|
—
|
|
|
|
410
|
|
|
|
—
|
|
|
|
410
|
|
|
Common stock issued through employee stock purchase plan
|
|
|
22,143
|
|
|
|
—
|
|
|
|
18
|
|
|
|
—
|
|
|
|
18
|
|
|
Common stock issued, net of expenses
|
|
|
285,276
|
|
|
|
1
|
|
|
|
206
|
|
|
|
—
|
|
|
|
207
|
|
|
Common stock issued for vested restricted stock units
|
|
|
154,902
|
|
|
|
—
|
|
|
|
(73
|
)
|
|
|
—
|
|
|
|
(73
|
)
|
|
Balance, March 31, 2020
|
|
|
97,876,042
|
|
|
$
|
98
|
|
|
$
|
284,787
|
|
|
$
|
(278,430
|
)
|
|
$
|
6,455
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Three Months Ended March 31, 2019
|
|
|
|
|
Shares of
Common Stock
|
|
|
Common
Stock
|
|
|
Additional
Paid-in
Capital
|
|
|
Accumulated
Deficit
|
|
|
Total
Stockholders’
Equity
|
|
|
Balance, December 31, 2018
|
|
|
47,971,989
|
|
|
$
|
48
|
|
|
$
|
248,895
|
|
|
$
|
(217,718
|
)
|
|
$
|
31,225
|
|
|
Net loss
|
|
|
—
|
|
|
|
—
|
|
|
|
—
|
|
|
|
(22,908
|
)
|
|
|
(22,908
|
)
|
|
Stock-based compensation expense
|
|
|
—
|
|
|
|
—
|
|
|
|
492
|
|
|
|
—
|
|
|
|
492
|
|
|
Common stock issued through employee stock purchase plan
|
|
|
19,259
|
|
|
|
—
|
|
|
|
20
|
|
|
|
—
|
|
|
|
20
|
|
|
Common stock issued, net of expenses
|
|
|
2,226,569
|
|
|
|
2
|
|
|
|
2,507
|
|
|
|
—
|
|
|
|
2,509
|
|
|
Common stock issued for vested restricted stock units
|
|
|
14,612
|
|
|
|
—
|
|
|
|
(8
|
)
|
|
|
—
|
|
|
|
(8
|
)
|
|
Balance, March 31, 2019
|
|
|
50,232,429
|
|
|
$
|
50
|
|
|
$
|
251,906
|
|
|
$
|
(240,626
|
)
|
|
$
|
11,330
|
|
|
| Common Stock Reserved For Future Issuances |
The Company had reserved shares of common stock for future issuance as follows:
|
|
March 31, 2020
|
|
|
December 31, 2019
|
|
|
Outstanding stock options
|
|
7,684,762
|
|
|
|
5,261,860
|
|
|
Outstanding restricted stock units
|
|
862,514
|
|
|
|
966,394
|
|
|
Warrants to purchase common stock associated with June 2016 Public Offering
|
|
4,218,750
|
|
|
|
4,218,750
|
|
|
Warrants to purchase common stock associated with March 2018 Public Offering – Series 2
|
|
7,988,175
|
|
|
|
7,988,175
|
|
|
Warrants to purchase common stock associated with December 2019 Public Offering
|
|
44,722,222
|
|
|
|
44,722,222
|
|
|
Option to purchase common stock associated with December 2019 Public Offering
|
|
—
|
|
|
|
5,833,333
|
|
|
Warrants to purchase common stock associated with Solar loan agreement
|
|
122,435
|
|
|
|
122,435
|
|
|
For possible future issuance for the conversion of the 6% senior convertible notes
|
|
11,382,000
|
|
|
|
11,382,000
|
|
|
For possible future issuance under 2014 Equity Incentive Plan (Note 9)
|
|
1,900,861
|
|
|
|
554,774
|
|
|
For possible future issuance under Employee Stock Purchase Plan
|
|
81,499
|
|
|
|
74,231
|
|
|
For possible future issuance under 2015 Inducement Award Plan (Note 9)
|
|
315,500
|
|
|
|
315,500
|
|
|
Total common shares reserved for future issuance
|
|
79,278,718
|
|
|
|
81,439,674
|
|
|