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Consolidated Statements Of Shareholders' Equity (Deficit) - USD ($) shares in Thousands, $ in Thousands | Common Stock Issued [Member] | Additional Paid-In Capital [Member] | Treasury Stock [Member] | Retained Earnings (Deficit) [Member] | Total
--- | --- | --- | --- | --- | ---
Stockholders Equity, Beginning Balance at Dec. 31, 2014 | $ 6,519 | $ 64,351 | $ (37,299) | $ 146,892 | $ 180,463
Shares, Outstanding, Beginning Balance at Dec. 31, 2014 | 65,195 |  | (7,394) |  |
Shares issued - stock-based compensation | $ 85 | 957 |  |  | 1,042
Shares issued - stock-based compensation, Shares | 846 |  |  |  |
Stock-based compensation expense |  | 3,810 |  |  | 3,810
Treasury stock acquired |  |  | $ (583) |  | (583)
Treasury stock acquired, Shares |  |  | (120) |  |
Net income (loss) |  |  |  | (158,656) | (158,656)
Stockholders Equity, Ending Balance (Cumulative-Effect Adjustment, Accounting Standards Update 2016-09 [Member]) at Dec. 31, 2015 | $ 6,562 | 70,150 | $ (37,882) | (12,754) | 26,076
Stockholders Equity, Ending Balance at Dec. 31, 2015 | $ 6,604 | 69,118 | $ (37,882) | (11,764) | 26,076
Shares, Outstanding, Ending Balance (Cumulative-Effect Adjustment, Accounting Standards Update 2016-09 [Member]) at Dec. 31, 2015 | 65,621 |  | (7,514) |  |
Shares, Outstanding, Ending Balance at Dec. 31, 2015 | 66,041 |  | (7,514) |  |
Cumulative effect adjustment for adoption of ASU 2016-09 | Cumulative-Effect Adjustment, Accounting Standards Update 2016-09 [Member] | $ (42) | 1,032 |  | (990) |
Cumulative effect adjustment for adoption of ASU 2016-09, Shares | Cumulative-Effect Adjustment, Accounting Standards Update 2016-09 [Member] | (420) |  |  |  |
Shares issued - stock-based compensation | $ 49 | (49) |  |  |
Shares issued - stock-based compensation, Shares | 489 |  |  |  |
Stock-based compensation expense |  | 167 |  |  | 167
Treasury stock acquired |  |  | $ (51) |  | (51)
Treasury stock acquired, Shares |  |  | (41) |  |
Net income (loss) |  |  |  | (26,550) | (26,550)
Stockholders Equity, Ending Balance at Dec. 31, 2016 | $ 6,611 | 70,268 | $ (37,933) | (39,304) | (358)
Shares, Outstanding, Ending Balance at Dec. 31, 2016 | 66,110 |  | (7,555) |  |
Shares issued - stock-based compensation | $ 33 | 6 |  |  | 39
Shares issued - stock-based compensation, Shares | 334 |  |  |  |
Stock-based compensation expense |  | 977 |  |  | 977
Treasury stock acquired |  |  | $ (20) |  | (20)
Treasury stock acquired, Shares |  |  | (26) |  |
Net income (loss) |  |  |  | 9,651 | 9,651
Stockholders Equity, Ending Balance at Dec. 31, 2017 | $ 6,644 | $ 71,251 | $ (37,953) | $ (29,653) | $ 10,289
Shares, Outstanding, Ending Balance at Dec. 31, 2017 | 66,444 |  | (7,581) |  |

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