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Stockholders' Equity (Narrative) (Details) - USD ($) |  | 12 Months Ended |
--- | --- | --- | ---
Sep. 14, 2016 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010 | Dec. 31, 2003 | Dec. 31, 2015
Class Of Stock [Line Items] |  |  |  |  |  |  |  |
Common stock, shares authorized |  | 300,000,000 | 300,000,000 |  |  |  |  |
Common stock, par value |  | $ 0.01 | $ 0.01 |  |  |  |  |
Preferred stock, shares authorized |  | 10,000,000 | 10,000,000 |  |  |  |  |
Preferred stock, par value |  | $ 10.00 | $ 10.00 |  |  |  |  |
Options, Exercised (in shares) |  | 10,000 | 40,000 |  |  |  |  |
Convertible Preferred Stock, Shares Issuable upon Conversion |  | The Company's Class N preferred shares, each of which is convertible to 40 common shares, have the right to receive dividends or dividend equivalents should the Company declare dividends on its common stock. |  |  |  |  |  |
Class N preferred shares, each convertible to common shares |  | 40 |  |  |  |  |  |
Class N preferred shares, conversion price per share |  | $ 1,000 |  |  |  |  |  |
Term of Stock-Based Compensation Plan |  | 6 years 9 months 18 days | 6 years 9 months |  |  |  |  |
Exercise Price, Outstanding |  | $ 0.97 | $ 0.96 |  |  |  |  | $ 1.70
Options to purchase, Granted (in shares) |  | 50,000 | 3,259,200 |  |  |  |  |
Exercise price, options granted in period |  | $ 0.48 | $ 0.45 |  |  |  |  |
Stock-based compensation expense |  | $ 246,000 | $ 99,000 |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Number of Shares |  | 2,368,113 | 3,321,700 |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Weighted Average Grant Date Fair Value |  | $ 0.31 | $ 0.32 |  |  |  |  |
Employee Service-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Stock Options |  | $ 700,000 |  |  |  |  |  |
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition |  | 2 years 10 months 24 days |  |  |  |  |  |
Fair Value of Options Vested in Period |  | $ 300,000 | $ 400,000 |  |  |  |  |
Aggregate intrinsic value of exercisable options |  | $ 1,000 | $ 4,000 |  |  |  |  |
Number of restricted stock awards granted |  | 300,000 |  |  |  |  |  |
Other Options Issued [Member] |  |  |  |  |  |  |  |
Class Of Stock [Line Items] |  |  |  |  |  |  |  |
Stock Option Award Vesting Period |  |  |  | 4 years |  |  |  |
Options to purchase, Granted (in shares) |  | 0 | 0 | 625,000 |  |  |  |
Exercise price, options granted in period |  |  |  | $ 2.00 |  |  |  |
Stock Options [Member] | Selling, General and Administrative Expenses [Member] |  |  |  |  |  |  |  |
Class Of Stock [Line Items] |  |  |  |  |  |  |  |
Stock-based compensation expense |  | $ 200,000 | $ 100,000 |  |  |  |  |
Restricted Stock [Member] |  |  |  |  |  |  |  |
Class Of Stock [Line Items] |  |  |  |  |  |  |  |
Stock-based compensation expense |  | $ 4,000 | $ 18,000 |  |  |  |  |
Number of restricted shares awarded to each employee |  | 150,000 |  |  |  |  |  |
2003 Stock Option and Appreciation Rights Plan [Member] |  |  |  |  |  |  |  |
Class Of Stock [Line Items] |  |  |  |  |  |  |  |
Options, Exercised (in shares) |  | 10,000 | 40,000 |  |  |  |  |
Number of Shares Authorized for Stock-Based Compensation Plan |  |  |  |  |  |  | 2,000,000 |
Term of Stock-Based Compensation Plan |  |  |  |  |  |  | 10 years |
Stock Option Award Vesting Period |  |  |  |  |  |  | 4 years |
Options to purchase, Granted (in shares) |  | 0 |  |  |  |  |  |
2003 Stock Option and Appreciation Rights Plan [Member] | Minimum [Member] |  |  |  |  |  |  |  |
Class Of Stock [Line Items] |  |  |  |  |  |  |  |
Exercise Price, Outstanding |  |  |  |  |  |  | $ 0.08 |
2003 Stock Option and Appreciation Rights Plan [Member] | Maximum [Member] |  |  |  |  |  |  |  |
Class Of Stock [Line Items] |  |  |  |  |  |  |  |
Exercise Price, Outstanding |  |  |  |  |  |  | $ 2.00 |
2010 Non-Qualified Stock Option Plan [Member] |  |  |  |  |  |  |  |
Class Of Stock [Line Items] |  |  |  |  |  |  |  |
Number of Shares Authorized for Stock-Based Compensation Plan |  |  |  |  |  | 1,250,000 |  |
Stock Option Award Vesting Period |  |  |  |  |  | 4 years |  |
Options to purchase, Granted (in shares) |  | 50,000 | 720,000 |  |  |  |  |
2010 Non-Qualified Stock Option Plan [Member] | Directors [Member] | Annual Compensation [Member] |  |  |  |  |  |  |  |
Class Of Stock [Line Items] |  |  |  |  |  |  |  |
Options to purchase, Granted (in shares) |  | 50,000 | 70,000 |  |  |  |  |
2010 Non-Qualified Stock Option Plan [Member] | Directors [Member] | Special Grant to Directors [Member] |  |  |  |  |  |  |  |
Class Of Stock [Line Items] |  |  |  |  |  |  |  |
Options to purchase, Granted (in shares) |  |  | 125,000 |  |  |  |  |
2010 Non-Qualified Stock Option Plan [Member] | Officer [Member] | Special Grant to Employee Base [Member] |  |  |  |  |  |  |  |
Class Of Stock [Line Items] |  |  |  |  |  |  |  |
Options to purchase, Granted (in shares) |  |  | 525,000 |  |  |  |  |
2010 Non-Qualified Stock Option Plan [Member] | Minimum [Member] |  |  |  |  |  |  |  |
Class Of Stock [Line Items] |  |  |  |  |  |  |  |
Exercise Price, Outstanding |  |  |  |  |  | $ 0.24 |  |
2010 Non-Qualified Stock Option Plan [Member] | Maximum [Member] |  |  |  |  |  |  |  |
Class Of Stock [Line Items] |  |  |  |  |  |  |  |
Exercise Price, Outstanding |  |  |  |  |  | $ 0.70 |  |
Equity Partners Stock Option Plan [Member] |  |  |  |  |  |  |  |
Class Of Stock [Line Items] |  |  |  |  |  |  |  |
Number of Shares Authorized for Stock-Based Compensation Plan |  |  |  |  | 230,000 |  |  |
Options to purchase, Granted (in shares) |  | 0 | 0 |  | 230,000 |  |  |
Exercise price, options granted in period |  |  |  |  | $ 1.83 |  |  |
2016 Stock Option Plan [Member] |  |  |  |  |  |  |  |
Class Of Stock [Line Items] |  |  |  |  |  |  |  |
Number of Shares Authorized for Stock-Based Compensation Plan | 3,150,000 |  |  |  |  |  |  |
Stock Option Award Vesting Period | 4 years |  |  |  |  |  |  |
Exercise Price, Outstanding | $ 0.45 |  |  |  |  |  |  |
Options to purchase, Granted (in shares) |  | 0 | 2,539,200 |  |  |  |  |
Common Stock [Member] |  |  |  |  |  |  |  |
Class Of Stock [Line Items] |  |  |  |  |  |  |  |
Options, Exercised (in shares) |  | 10,000 | 40,000 |  |  |  |  |
Share price |  | $ 25.00 |  |  |  |  |  |
Class N preferred stockholders to liquidation preference, conversion price per share |  | $ 1,000 |  |  |  |  |  |
Preferred Stock [Member] |  |  |  |  |  |  |  |
Class Of Stock [Line Items] |  |  |  |  |  |  |  |
Convertible Preferred Stock, Shares Issuable upon Conversion |  | Each Class N preferred share has a voting entitlement equal to 40 common shares, votes with the common stock on an as-converted basis and is senior to all other preferred stock of the Company. Dividends, if any, will be paid on an as-converted basis equal to common stock dividends. The conversion value of each Class N preferred share is $1,000, and each share is convertible to 40 common shares at the rate of $25.00 per common share. The Class N preferred stockholders are entitled to liquidation preference over common stockholders equivalent to $1,000 per share. |  |  |  |  |  |
Conversion of class N preferred stock to shares of common stock |  | 0 | 0 |  |  |  |  |

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- Definition The per share liquidation preference (or restrictions) of nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer) that has a preference in involuntary liquidation considerably in excess of the par or stated value of the shares. The liquidation preference is the difference between the preference in liquidation and the par or stated values of the share. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=84159872&loc=d3e21475-112644 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=84159872&loc=d3e21484-112644 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(28)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(d)(1)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(d)(1)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
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- Definition Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of options outstanding and currently exercisable. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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