Consolidated Statement of Stockholders' Equity and Convertible Preferred Stock (Unaudited) - USD ($) shares in Thousands, $ in Thousands | Common Stock [Member] | Treasury Stock [Member] | Additional Paid-in Capital [Member] | Retained Earnings [Member] | Series A Convertible Preferred Stock [Member] | Series B Convertible Preferred Stock [Member] | Series C Convertible Preferred Stock [Member] | Total |
Balance (in shares) at Dec. 31, 2019 | 117,329 | 137 | | | | | | |
Balance at Dec. 31, 2019 | $ 12 | $ (685) | $ 224,091 | $ (133,701) | $ 48,084 | $ 49,814 | | $ 89,717 |
Share-based compensation | $ 0 | $ 0 | (606) | 0 | 0 | 0 | | (606) |
Restricted stock vesting (in shares) | 496 | 0 | | | | | | |
Shares repurchased related to share-based compensation (in shares) | (105) | 105 | | | | | | |
Shares repurchased related to share-based compensation | $ 0 | $ (322) | 0 | 0 | 0 | 0 | | (322) |
Preferred stock dividends | 0 | 0 | (10,565) | 0 | | | | (10,565) |
Deemed dividends - accretion of beneficial conversion feature | 0 | 0 | (113) | 0 | 113 | 0 | | (113) |
Net income (loss) | 0 | 0 | 0 | (12,050) | 0 | 0 | | (12,050) |
Restricted stock vesting | $ 0 | $ 0 | 0 | 0 | 0 | 0 | | 0 |
Preferred stock dividends | | | | | 5,389 | 5,135 | | 10,565 |
Balance (in shares) at Sep. 30, 2020 | 117,720 | 242 | | | | | | |
Balance at Sep. 30, 2020 | $ 12 | $ (1,007) | 212,807 | (145,751) | 53,586 | 54,949 | | 66,061 |
Balance (in shares) at Jun. 30, 2020 | 117,492 | 178 | | | | | | |
Balance at Jun. 30, 2020 | $ 12 | $ (796) | 215,807 | (138,573) | 51,727 | 53,192 | | 76,450 |
Share-based compensation | $ 0 | $ 0 | 629 | 0 | 0 | 0 | | 629 |
Restricted stock vesting (in shares) | 292 | 0 | | | | | | |
Shares repurchased related to share-based compensation (in shares) | (64) | 64 | | | | | | |
Shares repurchased related to share-based compensation | $ 0 | $ (211) | 0 | 0 | 0 | 0 | | (211) |
Preferred stock dividends | 0 | 0 | (3,613) | 0 | 1,843 | 1,757 | | (3,613) |
Deemed dividends - accretion of beneficial conversion feature | 0 | 0 | (16) | 0 | 16 | 0 | | (16) |
Net income (loss) | 0 | 0 | 0 | (7,178) | 0 | 0 | | (7,178) |
Restricted stock vesting | $ 0 | $ 0 | 0 | 0 | 0 | 0 | | 0 |
Preferred stock dividends | | | | | | | | 3,613 |
Balance (in shares) at Sep. 30, 2020 | 117,720 | 242 | | | | | | |
Balance at Sep. 30, 2020 | $ 12 | $ (1,007) | 212,807 | (145,751) | 53,586 | 54,949 | | 66,061 |
Balance (in shares) at Dec. 31, 2020 | 117,829 | 249 | | | | | | |
Balance at Dec. 31, 2020 | $ 12 | $ (1,031) | 209,481 | (148,030) | 55,522 | 56,781 | | 60,432 |
Share-based compensation | | | (5,799) | | | | | (5,799) |
Restricted stock vesting (in shares) | 590 | | | | | | | |
Shares repurchased related to share-based compensation (in shares) | (95) | 95 | | | | | | |
Shares repurchased related to share-based compensation | | $ (279) | | | | | | (279) |
Issuance of common stock, net (in shares) | 116 | | | | | | | |
Issuance of common stock, net | | | 151 | | | | $ 37,807 | 151 |
Stock dividend (in shares) | 798 | | | | | | | |
Exercise of common stock warrants (in shares) | 1,485 | | | | | | | |
Exercise of common stock warrants | | | 4,365 | | | | | 4,365 |
Preferred stock dividends | | | (13,015) | | 6,045 | 5,761 | 1,159 | (13,015) |
Deemed dividends - accretion of beneficial conversion feature | | | (47) | | 47 | | | (47) |
Net income (loss) | | | | (14,016) | | | | (14,016) |
Issuance of common stock, net (in shares) | 116 | | | | | | | |
Issuance of common stock, net | | | 151 | | | | 37,807 | 151 |
Exercise of common stock warrants (in shares) | 1,485 | | | | | | | |
Exercise of common stock warrants | | | 4,365 | | | | | 4,365 |
Preferred stock dividends | | | | | | | | 13,015 |
Balance (in shares) at Sep. 30, 2021 | 120,723 | 344 | | | | | | |
Balance at Sep. 30, 2021 | $ 12 | $ (1,310) | 195,136 | (162,046) | 61,614 | 62,542 | 38,966 | 31,792 |
Balance (in shares) at Jun. 30, 2021 | 118,482 | 300 | | | | | | |
Balance at Jun. 30, 2021 | $ 12 | $ (1,171) | 199,553 | (163,268) | 59,509 | 60,549 | 33,173 | 35,126 |
Share-based compensation | | | (3,653) | | | | | (3,653) |
Restricted stock vesting (in shares) | 285 | | | | | | | |
Shares repurchased related to share-based compensation (in shares) | (44) | 44 | | | | | | |
Shares repurchased related to share-based compensation | | $ (139) | | | | | | (139) |
Issuance of common stock, net (in shares) | 116 | | | | | | | |
Issuance of common stock, net | | | 151 | | | | 4,634 | $ 151 |
Stock dividend (in shares) | 399 | 0 | | | | | | |
Exercise of common stock warrants (in shares) | 1,485 | | | | | | | 1,500 |
Exercise of common stock warrants | | | 4,365 | | | | | $ 4,365 |
Preferred stock dividends | | | (5,264) | | 2,089 | 1,993 | 1,159 | (5,264) |
Deemed dividends - accretion of beneficial conversion feature | | | (16) | | 16 | | | (16) |
Net income (loss) | | | | 1,222 | | | | 1,222 |
Issuance of common stock, net (in shares) | 116 | | | | | | | |
Issuance of common stock, net | | | 151 | | | | 4,634 | $ 151 |
Exercise of common stock warrants (in shares) | 1,485 | | | | | | | 1,500 |
Exercise of common stock warrants | | | 4,365 | | | | | $ 4,365 |
Preferred stock dividends | | | | | | | | 5,264 |
Balance (in shares) at Sep. 30, 2021 | 120,723 | 344 | | | | | | |
Balance at Sep. 30, 2021 | $ 12 | $ (1,310) | $ 195,136 | $ (162,046) | $ 61,614 | $ 62,542 | $ 38,966 | $ 31,792 |