Condensed Consolidated Statements of Stockholders' Deficit - USD ($) $ in Thousands |
Common Stock [Member] |
Total |
Treasury Stock [Member] |
Additional Paid-in Capital [Member] |
Retained Earnings [Member] |
Balance, shares at Dec. 31, 2018 |
2,877
|
|
7
|
|
|
Balance at Dec. 31, 2018 |
$ 287
|
|
$ (1,680)
|
$ 175,820
|
$ (158,981)
|
Common stock issued, shares |
9
|
|
|
|
|
Common stock issued |
$ 1
|
|
|
|
|
Restricted stock issued, shares |
|
|
|
|
|
Restricted stock issued |
|
|
|
|
|
Common stock issued through market sales, shares |
|
|
|
|
|
Common stock issued through market sales |
|
|
|
|
|
Treasury stock purchased |
|
|
$ (32)
|
|
|
Treasury stock purchased, shares |
|
|
3
|
|
|
Common stock issued through offering, net of expenses |
$ 94
|
|
|
5,868
|
|
Common stock issued through offerings, shares |
933
|
|
|
|
|
Adoption of ASC 842 |
|
|
|
|
55
|
Extinguishment of Series A Shares |
|
|
|
|
|
Beneficial Conversion Feature in connection with Series B Issuance |
|
|
|
|
|
Amortization of Beneficial Conversion Feature |
|
|
|
|
|
Stock-based compensation expense |
|
|
|
266
|
|
Net loss |
|
|
|
|
(3,326)
|
Balance, ending balance shares at Mar. 31, 2019 |
3,819
|
|
10
|
|
|
Balance at Mar. 31, 2019 |
$ 382
|
|
$ (1,712)
|
181,954
|
(162,252)
|
Balance, shares at Dec. 31, 2018 |
2,877
|
|
7
|
|
|
Balance at Dec. 31, 2018 |
$ 287
|
|
$ (1,680)
|
175,820
|
(158,981)
|
Net loss |
|
$ (26,740)
|
|
|
|
Balance, ending balance shares at Dec. 31, 2019 |
3,932
|
|
12
|
|
|
Balance at Dec. 31, 2019 |
$ 393
|
(4,479)
|
$ (1,721)
|
182,514
|
(185,665)
|
Balance, shares at Mar. 31, 2019 |
3,819
|
|
10
|
|
|
Balance at Mar. 31, 2019 |
$ 382
|
|
$ (1,712)
|
181,954
|
(162,252)
|
Common stock issued, shares |
10
|
|
|
|
|
Common stock issued |
$ 1
|
|
|
72
|
|
Treasury stock purchased |
|
|
|
|
|
Treasury stock purchased, shares |
|
|
|
|
|
Stock-based compensation expense |
|
|
|
205
|
|
Net loss |
|
|
|
|
(5,304)
|
Balance, ending balance shares at Jun. 30, 2019 |
3,829
|
|
10
|
|
|
Balance at Jun. 30, 2019 |
$ 383
|
|
$ (1,712)
|
182,231
|
(167,556)
|
Common stock issued, shares |
|
|
|
|
|
Common stock issued |
|
|
|
|
|
Treasury stock purchased |
|
|
|
|
|
Treasury stock purchased, shares |
|
|
|
|
|
Dividends accrued |
|
|
|
(75)
|
|
Stock-based compensation expense |
|
|
|
205
|
|
Net loss |
|
|
|
|
(7,446)
|
Balance, ending balance shares at Sep. 30, 2019 |
3,829
|
|
10
|
|
|
Balance at Sep. 30, 2019 |
$ 383
|
|
$ (1,712)
|
182,361
|
(175,002)
|
Common stock issued, shares |
5
|
|
|
|
|
Common stock issued |
|
|
|
|
|
Common stock issued through market sales, shares |
98
|
|
|
|
|
Common stock issued through market sales |
$ 10
|
|
|
218
|
|
Treasury stock purchased |
|
|
$ (9)
|
|
|
Treasury stock purchased, shares |
|
|
2
|
|
|
Dividends accrued |
|
|
|
(354)
|
|
Stock-based compensation expense |
|
|
|
289
|
|
Net loss |
|
|
|
|
(10,663)
|
Balance, ending balance shares at Dec. 31, 2019 |
3,932
|
|
12
|
|
|
Balance at Dec. 31, 2019 |
$ 393
|
(4,479)
|
$ (1,721)
|
182,514
|
(185,665)
|
Common stock issued, shares |
37
|
|
|
|
|
Common stock issued |
$ 1
|
|
|
|
|
Restricted stock issued, shares |
6
|
|
|
|
|
Restricted stock issued |
|
|
|
|
|
Common stock issued through market sales, shares |
80
|
|
|
|
|
Common stock issued through market sales |
$ 8
|
|
|
476
|
|
Common stock issued through ESPP, shares |
|
|
|
|
|
Common stock issued through ESPP |
|
|
|
|
|
Treasury stock purchased |
|
|
|
|
|
Treasury stock purchased, shares |
|
|
|
|
|
Common stock issued through offering, net of expenses |
|
|
|
|
|
Common stock issued through offerings, shares |
|
|
|
|
|
Adoption of ASC 842 |
|
|
|
|
|
Extinguishment of Series A Shares |
|
|
|
(828)
|
|
Beneficial Conversion Feature in connection with Series B Issuance |
|
|
|
2,205
|
|
Amortization of Beneficial Conversion Feature |
|
|
|
(2,205)
|
|
Stock-based compensation expense |
|
|
|
418
|
|
Net loss |
|
|
|
|
(6,494)
|
Balance, ending balance shares at Mar. 31, 2020 |
4,055
|
|
12
|
|
|
Balance at Mar. 31, 2020 |
$ 402
|
|
$ (1,721)
|
182,580
|
(192,159)
|
Balance, shares at Dec. 31, 2019 |
3,932
|
|
12
|
|
|
Balance at Dec. 31, 2019 |
$ 393
|
(4,479)
|
$ (1,721)
|
182,514
|
(185,665)
|
Net loss |
|
(18,308)
|
|
|
|
Balance, ending balance shares at Sep. 30, 2020 |
4,060
|
|
19
|
|
|
Balance at Sep. 30, 2020 |
$ 402
|
(21,798)
|
$ (1,770)
|
183,543
|
(203,973)
|
Balance, shares at Dec. 31, 2019 |
3,932
|
|
12
|
|
|
Balance at Dec. 31, 2019 |
$ 393
|
(4,479)
|
$ (1,721)
|
182,514
|
(185,665)
|
Net loss |
|
(26,451)
|
|
|
|
Balance, ending balance shares at Dec. 31, 2020 |
4,075
|
|
20
|
|
|
Balance at Dec. 31, 2020 |
$ 402
|
(29,083)
|
$ (1,773)
|
184,404
|
(212,116)
|
Balance, shares at Mar. 31, 2020 |
4,055
|
|
12
|
|
|
Balance at Mar. 31, 2020 |
$ 402
|
|
$ (1,721)
|
182,580
|
(192,159)
|
Common stock issued, shares |
|
|
|
|
|
Common stock issued |
|
|
|
|
|
Treasury stock purchased |
|
|
$ (49)
|
|
|
Treasury stock purchased, shares |
|
|
7
|
|
|
Stock-based compensation expense |
|
|
|
400
|
|
Net loss |
|
|
|
|
(5,580)
|
Balance, ending balance shares at Jun. 30, 2020 |
4,055
|
|
19
|
|
|
Balance at Jun. 30, 2020 |
$ 402
|
|
$ (1,770)
|
182,980
|
(197,739)
|
Common stock issued, shares |
5
|
|
|
|
|
Common stock issued |
|
|
|
|
|
Common stock issued through ESPP, shares |
|
|
|
|
|
Common stock issued through ESPP |
|
|
|
|
|
Treasury stock purchased |
|
|
|
|
|
Treasury stock purchased, shares |
|
|
|
|
|
Dividends accrued |
|
|
|
|
|
Stock-based compensation expense |
|
|
|
563
|
|
Net loss |
|
(6,234)
|
|
|
(6,234)
|
Balance, ending balance shares at Sep. 30, 2020 |
4,060
|
|
19
|
|
|
Balance at Sep. 30, 2020 |
$ 402
|
(21,798)
|
$ (1,770)
|
183,543
|
(203,973)
|
Common stock issued, shares |
15
|
|
|
|
|
Common stock issued |
|
|
|
|
|
Common stock issued through market sales, shares |
|
|
|
|
|
Common stock issued through market sales |
|
|
|
|
|
Treasury stock purchased |
|
|
$ (3)
|
|
|
Treasury stock purchased, shares |
|
|
1
|
|
|
Dividends accrued |
|
|
|
|
|
Stock-based compensation expense |
|
|
|
861
|
|
Net loss |
|
|
|
|
(8,143)
|
Balance, ending balance shares at Dec. 31, 2020 |
4,075
|
|
20
|
|
|
Balance at Dec. 31, 2020 |
$ 402
|
(29,083)
|
$ (1,773)
|
184,404
|
(212,116)
|
Common stock issued, shares |
9
|
|
|
|
|
Common stock issued |
|
|
|
108
|
|
Restricted stock issued, shares |
12
|
|
|
|
|
Restricted stock issued |
|
|
|
|
|
Common stock issued through market sales, shares |
|
|
|
|
|
Common stock issued through market sales |
|
|
|
|
|
Common stock issued through ESPP, shares |
36
|
|
|
|
|
Common stock issued through ESPP |
|
|
|
|
|
Treasury stock purchased |
|
|
|
|
|
Treasury stock purchased, shares |
|
|
|
|
|
Extinguishment of Series A Shares |
|
|
|
|
|
Beneficial Conversion Feature in connection with Series B Issuance |
|
|
|
|
|
Amortization of Beneficial Conversion Feature |
|
|
|
|
|
Stock-based compensation expense |
|
|
|
286
|
|
Net loss |
|
|
|
|
(4,207)
|
Balance, ending balance shares at Mar. 31, 2021 |
4,132,000
|
|
20
|
|
|
Balance at Mar. 31, 2021 |
$ 402
|
|
$ (1,773)
|
184,798
|
(216,323)
|
Balance, shares at Dec. 31, 2020 |
4,075
|
|
20
|
|
|
Balance at Dec. 31, 2020 |
$ 402
|
(29,083)
|
$ (1,773)
|
184,404
|
(212,116)
|
Net loss |
|
(11,214)
|
|
|
|
Balance, ending balance shares at Sep. 30, 2021 |
4,194
|
|
20
|
|
|
Balance at Sep. 30, 2021 |
$ 403
|
(38,648)
|
$ (1,773)
|
186,052
|
(223,330)
|
Balance, shares at Mar. 31, 2021 |
4,132,000
|
|
20
|
|
|
Balance at Mar. 31, 2021 |
$ 402
|
|
$ (1,773)
|
184,798
|
(216,323)
|
Common stock issued, shares |
10
|
|
|
|
|
Common stock issued |
|
|
|
|
|
Treasury stock purchased |
|
|
|
|
|
Treasury stock purchased, shares |
|
|
|
|
|
Stock-based compensation expense |
|
|
|
551
|
|
Net loss |
|
|
|
|
(3,446)
|
Balance, ending balance shares at Jun. 30, 2021 |
4,142
|
|
20
|
|
|
Balance at Jun. 30, 2021 |
$ 402
|
|
$ (1,773)
|
185,349
|
(219,769)
|
Common stock issued, shares |
13
|
|
|
|
|
Common stock issued |
|
|
|
226
|
|
Common stock issued through ESPP, shares |
39
|
|
|
|
|
Common stock issued through ESPP |
$ 1
|
|
|
|
|
Treasury stock purchased |
|
|
|
|
|
Treasury stock purchased, shares |
|
|
|
|
|
Stock-based compensation expense |
|
|
|
477
|
|
Net loss |
|
(3,561)
|
|
|
(3,561)
|
Balance, ending balance shares at Sep. 30, 2021 |
4,194
|
|
20
|
|
|
Balance at Sep. 30, 2021 |
$ 403
|
$ (38,648)
|
$ (1,773)
|
$ 186,052
|
$ (223,330)
|