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Condensed Consolidated Statement of Stockholders' Equity Statement - USD ($) $ in Thousands | Total | Common Stock [Member] | Additional Paid-in Capital [Member] | Treasury Stock [Member] | Retained Earnings [Member] | Accumulated Other Comprehensive Income, net of tax [Member]
--- | --- | --- | --- | --- | --- | ---
Common Stock, Shares, Outstanding, Beginning Balance at Dec. 31, 2018 |  | 37,155,906 |  |  |  |
Stockholders' Equity Attributable to Parent at Dec. 31, 2018 | $ 54,899 | $ 42 | $ 364,877 | $ (13,938) | $ (292,708) | $ (3,374)
Treasury Stock, Shares - Beginning Balance at Dec. 31, 2018 |  |  |  | 4,417,585 |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures |  | 815,976 |  |  |  |
Stock Issued During Period, Value, Restricted Stock Award, Gross | (18,642) | $ 1 | (18,643) |  |  |
Stock Issued During Period, Shares, Employee Stock Purchase Plans |  | 35,340 |  |  |  |
Proceeds from Stock Plans | 943 |  | 943 |  |  |
Stock Issued During Period, Shares, Conversion of Convertible Securities |  | 2,176,501 |  |  |  |
Stock Issued During Period, Value, Conversion of Convertible Securities | 44,811 | $ 2 | 44,809 |  |  |
Adjustment to additional paid in capital, termination of bond hedge and warrant | 64,819 |  | 64,819 |  |  |
Adjustment to additional paid in capital, termination of warrant | (45,243) |  | (45,243) |  |  |
Adjustments to Additional Paid in Capital, Equity Component of Convertible Debt | 32,883 |  | 32,883 |  |  |
Adjustments to Additional Paid in Capital, Other | (16,445) |  | (16,445) |  |  |
APIC, Share-based Payment Arrangement, Increase for Cost Recognition | 11,995 |  | 11,995 |  |  |
Other Comprehensive Income (Loss), Net of Tax | (92) |  |  |  |  | (92)
Net Income (Loss) Attributable to Parent | (34,434) |  |  |  | (34,434) |
Treasury Stock, Shares - Enging Balance at Jun. 30, 2019 |  |  |  | 4,417,585 |  |
Stockholders' Equity Attributable to Parent at Jun. 30, 2019 | 95,494 | $ 45 | 439,995 | $ (13,938) | (327,142) | (3,466)
Common Stock, Shares, Outstanding, Ending Balance at Jun. 30, 2019 |  | 40,183,723 |  |  |  |
Common Stock, Shares, Outstanding, Beginning Balance at Mar. 31, 2019 |  | 37,872,661 |  |  |  |
Stockholders' Equity Attributable to Parent at Mar. 31, 2019 | 30,470 | $ 42 | 357,635 | $ (13,938) | (309,625) | (3,644)
Treasury Stock, Shares - Beginning Balance at Mar. 31, 2019 |  |  |  | 4,417,585 |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures |  | 134,561 |  |  |  |
Stock Issued During Period, Value, Restricted Stock Award, Gross | (4,403) | $ 1 | (4,404) |  |  |
Stock Issued During Period, Shares, Conversion of Convertible Securities |  | 2,176,501 |  |  |  |
Stock Issued During Period, Value, Conversion of Convertible Securities | 44,811 | $ 2 | 44,809 |  |  |
Adjustment to additional paid in capital, termination of bond hedge and warrant | 64,819 |  | 64,819 |  |  |
Adjustment to additional paid in capital, termination of warrant | (45,243) |  | (45,243) |  |  |
Adjustments to Additional Paid in Capital, Equity Component of Convertible Debt | 32,883 |  | 32,883 |  |  |
Adjustments to Additional Paid in Capital, Other | (16,445) |  | (16,445) |  |  |
APIC, Share-based Payment Arrangement, Increase for Cost Recognition | 5,941 |  | 5,941 |  |  |
Other Comprehensive Income (Loss), Net of Tax | 178 |  |  |  |  | 178
Net Income (Loss) Attributable to Parent | (17,517) |  |  |  | (17,517) |
Treasury Stock, Shares - Enging Balance at Jun. 30, 2019 |  |  |  | 4,417,585 |  |
Stockholders' Equity Attributable to Parent at Jun. 30, 2019 | $ 95,494 | $ 45 | 439,995 | $ (13,938) | (327,142) | (3,466)
Common Stock, Shares, Outstanding, Ending Balance at Jun. 30, 2019 |  | 40,183,723 |  |  |  |
Common Stock, Shares, Outstanding, Beginning Balance at Dec. 31, 2019 | 42,630,123 | 42,630,123 |  |  |  |
Stockholders' Equity Attributable to Parent at Dec. 31, 2019 | $ 164,996 | $ 47 | 560,496 | $ (29,847) | (361,789) | (3,911)
Treasury Stock, Shares - Beginning Balance at Dec. 31, 2019 | 4,680,723 |  |  | 4,680,723 |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures |  | 647,401 |  |  |  |
Stock Issued During Period, Value, Restricted Stock Award, Gross | $ (20,221) | $ 1 | (20,222) |  |  |
Stock Issued During Period, Shares, Employee Stock Purchase Plans | 26,774 | 26,774 |  |  |  |
Proceeds from Stock Plans | $ 1,364 |  | 1,364 |  |  |
Warrant Exercise, Shares |  | 163 |  |  |  |
Warrant Exercise, Value | 0 |  |  |  |  |
APIC, Share-based Payment Arrangement, Increase for Cost Recognition | 12,058 |  | 12,058 |  |  |
Other Comprehensive Income (Loss), Net of Tax | (84) |  |  |  |  | (84)
Net Income (Loss) Attributable to Parent | $ (39,943) |  |  |  | (39,943) |
Treasury Stock, Shares - Enging Balance at Jun. 30, 2020 | 4,680,723 |  |  | 4,680,723 |  |
Stockholders' Equity Attributable to Parent at Jun. 30, 2020 | $ 118,170 | $ 48 | 553,696 | $ (29,847) | (401,732) | (3,995)
Common Stock, Shares, Outstanding, Ending Balance at Jun. 30, 2020 | 43,304,461 | 43,304,461 |  |  |  |
Common Stock, Shares, Outstanding, Beginning Balance at Mar. 31, 2020 |  | 43,291,660 |  |  |  |
Stockholders' Equity Attributable to Parent at Mar. 31, 2020 | $ 129,610 | $ 48 | 548,014 | $ (29,847) | (384,524) | (4,081)
Treasury Stock, Shares - Beginning Balance at Mar. 31, 2020 |  |  |  | 4,680,723 |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures |  | 12,801 |  |  |  |
Stock Issued During Period, Value, Restricted Stock Award, Gross | $ (49) |  | (49) |  |  |
Stock Issued During Period, Shares, Employee Stock Purchase Plans | 0 |  |  |  |  |
APIC, Share-based Payment Arrangement, Increase for Cost Recognition | $ 5,731 |  | 5,731 |  |  |
Other Comprehensive Income (Loss), Net of Tax | 86 |  |  |  |  | 86
Net Income (Loss) Attributable to Parent | $ (17,208) |  |  |  |  |
Treasury Stock, Shares - Enging Balance at Jun. 30, 2020 | 4,680,723 |  |  | 4,680,723 |  |
Stockholders' Equity Attributable to Parent at Jun. 30, 2020 | $ 118,170 | $ 48 | $ 553,696 | $ (29,847) | $ (401,732) | $ (3,995)
Common Stock, Shares, Outstanding, Ending Balance at Jun. 30, 2020 | 43,304,461 | 43,304,461 |  |  |  |

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