Consolidated Statement of Stockholders' Equity, Series A and Series B Convertible Preferred Stock (Unaudited) - USD ($) shares in Thousands, $ in Thousands | Common Stock [Member]Cumulative Effect, Period of Adoption, Adjustment [Member] | Common Stock [Member] | Treasury Stock [Member]Cumulative Effect, Period of Adoption, Adjustment [Member] | Treasury Stock [Member] | Additional Paid-in Capital [Member]Cumulative Effect, Period of Adoption, Adjustment [Member] | Additional Paid-in Capital [Member] | Retained Earnings [Member]Cumulative Effect, Period of Adoption, Adjustment [Member] | Retained Earnings [Member] | Series A Convertible Preferred Stock [Member]Cumulative Effect, Period of Adoption, Adjustment [Member] | Series A Convertible Preferred Stock [Member] | Series B Convertible Preferred Stock [Member]Cumulative Effect, Period of Adoption, Adjustment [Member] | Series B Convertible Preferred Stock [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | Total |
Balance (in shares) at Dec. 31, 2018 | | 106,856 | | 6 | | | | | | | | | | |
Balance (Accounting Standards Update 2016-02 [Member]) at Dec. 31, 2018 | $ 0 | | $ 0 | | $ 0 | | $ (213) | | $ 0 | | $ 0 | | $ (213) | |
Balance (Accounting Standards Update 2018-07 [Member]) at Dec. 31, 2018 | $ 0 | | $ 0 | | $ 2,116 | | $ 0 | | $ 0 | | $ 0 | | $ 2,116 | |
Balance at Dec. 31, 2018 | | $ 11 | | $ (35) | | $ 180,862 | | $ (97,617) | | $ 40,091 | | $ 26,159 | | $ 83,221 |
Share-based compensation | | $ 0 | | $ 0 | | (11,738) | | 0 | | 0 | | 0 | | (11,738) |
Restricted stock vesting (in shares) | | 498 | | 0 | | | | | | | | | | |
Restricted stock vesting | | $ 0 | | $ 0 | | 495 | | 0 | | 0 | | 0 | | 495 |
Shares repurchased related to share-based compensation (in shares) | | (131) | | 131 | | | | | | | | | | |
Shares repurchased related to share-based compensation | | $ 0 | | $ (650) | | 0 | | 0 | | 0 | | 0 | | (650) |
Preferred stock dividends | | 0 | | 0 | | (7,821) | | 0 | | 4,771 | | 3,020 | | (7,821) |
Deemed dividends - accretion of beneficial conversion feature | | 0 | | 0 | | (1,324) | | 0 | | 1,324 | | 0 | | (1,324) |
Net income (loss) | | $ 0 | | $ 0 | | 0 | | (21,990) | | 0 | | 0 | | (21,990) |
Issuance of Series B Convertible Preferred Stock (in shares) | | 0 | | 0 | | | | | | | | | | |
Issuance of Series B Convertible Preferred Stock | | $ 0 | | $ 0 | | 0 | | 0 | | 0 | | 19,009 | | 0 |
Balance (in shares) at Sep. 30, 2019 | | 107,223 | | 137 | | | | | | | | | | |
Balance at Sep. 30, 2019 | | $ 11 | | $ (685) | | 162,590 | | (119,820) | | 46,186 | | 48,188 | | 42,096 |
Balance (in shares) at Jun. 30, 2019 | | 107,169 | | 103 | | | | | | | | | | |
Balance at Jun. 30, 2019 | | $ 11 | | $ (466) | | 170,374 | | (116,592) | | 44,263 | | 46,987 | | 53,327 |
Share-based compensation | | $ 0 | | $ 0 | | (4,648) | | 0 | | 0 | | 0 | | (4,648) |
Restricted stock vesting (in shares) | | 88 | | 0 | | | | | | | | | | |
Restricted stock vesting | | $ 0 | | $ 0 | | 0 | | 0 | | 0 | | 0 | | 0 |
Shares repurchased related to share-based compensation (in shares) | | (34) | | 34 | | | | | | | | | | |
Shares repurchased related to share-based compensation | | $ 0 | | $ (219) | | 0 | | 0 | | 0 | | 0 | | (219) |
Preferred stock dividends | | 0 | | 0 | | (2,850) | | 0 | | 1,637 | | 1,201 | | (2,850) |
Deemed dividends - accretion of beneficial conversion feature | | 0 | | 0 | | (286) | | 0 | | 286 | | 0 | | (286) |
Net income (loss) | | $ 0 | | $ 0 | | 0 | | (3,228) | | 0 | | 0 | | (3,228) |
Balance (in shares) at Sep. 30, 2019 | | 107,223 | | 137 | | | | | | | | | | |
Balance at Sep. 30, 2019 | | $ 11 | | $ (685) | | 162,590 | | (119,820) | | 46,186 | | 48,188 | | 42,096 |
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 | | | | | | | | | | |
Restricted stock vesting | | $ 0 | | $ 0 | | 0 | | 0 | | 0 | | 0 | | 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 | | 5,389 | | 5,135 | | (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) |
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 | | | | | | | | | | |
Restricted stock vesting | | $ 0 | | $ 0 | | 0 | | 0 | | 0 | | 0 | | 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) |
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 |