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Consolidated Statements of Equity (Unaudited) - USD ($) | Total | Common Stock [Member] | Additional Paid-In Capital [Member] | Accumulated Other Comprehensive Loss [Member] | Retained Deficit [Member] | Noncontrolling Interests [Member]
--- | --- | --- | --- | --- | --- | ---
Balance (in shares) at Dec. 31, 2015 |  | 15,332,041 |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period | 5,999 |  |  |  |  |
Proceeds from Stock Options Exercised | $ 14,000 |  | $ 14,000 |  |  |
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures |  | 321,068 |  |  |  |
Noncontrolling Interest, Increase from Subsidiary Equity Issuance | 4,000 |  |  |  |  | $ 4,000
Redemption and retirement of shares (in shares) |  | (311,022) |  |  |  |
Balance (in shares) at Dec. 31, 2016 |  | 15,348,086 |  |  |  |
Balance at Dec. 31, 2015 | 10,951,000 | $ 0 | 211,083,000 | $ (600,000) | $ (199,524,000) | (8,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Amortization of deferred stock-based compensation costs | 1,416,000 |  | 1,416,000 |  |  |
Redemption and retirement of shares | (949,000) |  | (949,000) |  | 0 |
Adjustments to Additional Paid in Capital, Share-based Compensation and Exercise of Stock Options | 82,000 |  | 82,000 |  |  |
Net loss | (6,341,000) |  |  |  | (6,335,000) | (6,000)
Foreign currency translation adjustment, net of tax |  |  |  | 600,000 |  |
Balance at Dec. 31, 2016 | 5,777,000 | $ 0 | 211,646,000 | 0 | (205,859,000) | (10,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest | $ (5,741,000) |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period | 0 |  |  |  |  |
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures |  | 102,000 |  |  |  |
Noncontrolling Interest, Increase from Subsidiary Equity Issuance | $ 7,000 |  |  |  |  | (7,000)
Redemption and retirement of shares (in shares) |  | (158,202) |  |  |  |
Balance (in shares) at Dec. 31, 2017 |  | 15,291,884 |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Amortization of deferred stock-based compensation costs | 1,528,000 |  | 1,528,000 |  |  |
Redemption and retirement of shares | (389,000) |  | (389,000) |  | 0 |
Adjustments to Additional Paid in Capital, Share-based Compensation and Exercise of Stock Options | 0 |  |  |  |  |
Net loss | (40,872,000) |  |  |  | (40,781,000) | (91,000)
Foreign currency translation adjustment, net of tax |  |  |  | (2,178,000) |  |
Balance at Dec. 31, 2017 | (36,127,000) | $ 0 | $ 212,785,000 | $ (2,178,000) | $ (246,640,000) | $ (94,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest | $ (43,050,000) |  |  |  |  |

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