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Stock-Based Compensation (Details) (USD $) | 3 Months Ended | 6 Months Ended | 12 Months Ended | 6 Months Ended | 3 Months Ended | 6 Months Ended | 3 Months Ended | 6 Months Ended | 3 Months Ended | 6 Months Ended
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Jun. 30, 2014 | Jun. 30, 2013 | Jun. 30, 2014 | Jun. 30, 2013 | Jun. 30, 2014 Stock Options [Member] | Jun. 30, 2013 Stock Options [Member] | Dec. 31, 2013 Stock Options [Member] | Jun. 30, 2014 Restricted Stock [Member] | Jun. 30, 2014 Cost of revenue [Member] | Jun. 30, 2013 Cost of revenue [Member] | Jun. 30, 2014 Cost of revenue [Member] | Jun. 30, 2013 Cost of revenue [Member] | Jun. 30, 2014 Selling, general and administrative [Member] | Jun. 30, 2013 Selling, general and administrative [Member] | Jun. 30, 2014 Selling, general and administrative [Member] | Jun. 30, 2013 Selling, general and administrative [Member] | Jun. 30, 2014 Research and development [Member] | Jun. 30, 2013 Research and development [Member] | Jun. 30, 2014 Research and development [Member] | Jun. 30, 2013 Research and development [Member]
Stock-based compensation in the form of employee stock options and restricted stock [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total stock-based compensation | $ 297,000 | $ 338,000 | $ 589,000 | $ 670,000 |  |  |  |  | $ 5,000 | $ 5,000 | $ 10,000 | $ 11,000 | $ 245,000 | $ 291,000 | $ 489,000 | $ 575,000 | $ 47,000 | $ 42,000 | $ 90,000 | $ 84,000
Tax effect on stock-based compensation | 0 | 0 | 0 | 0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net effect on net income (loss) | 297,000 | 338,000 | 589,000 | 670,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Weighted average assumptions [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Expected term | 4 years |  | 4 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Volatility (in hundredths) | 66.32% |  | 66.32% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Expected dividend (in hundredths) | 0.00% |  | 0.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Risk-free interest rate (in hundredths) | 1.98% |  | 1.98% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Compensation costs related to unvested stock options not yet recognized |  |  |  |  | 1,200,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Value of estimated forfeitures |  |  |  |  | 78,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Weighted-average period of amortization |  |  |  |  | 2 years 6 months |  |  | 1 year 4 months 24 days |  |  |  |  |  |  |  |  |  |  |  |
Number of options outstanding [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Options outstanding, beginning of period (in shares) |  |  |  |  | 2,671,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Granted (in shares) |  |  |  |  | 52,000 | 0 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exercised (in shares) |  |  |  |  | (5,000) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Canceled and expired (in shares) |  |  |  |  | (73,000) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Options outstanding, end of period (in shares) |  |  |  |  | 2,645,000 |  | 2,671,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Options vested and expected to vest as of June 30, 2014 |  |  |  |  | 2,645,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Options exercisable as of June 30, 2014 |  |  |  |  | 1,729,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Weighted average exercise price [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Options outstanding, beginning of period (in dollars per share) |  |  |  |  | $ 3.29 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Granted (in dollars per share) |  |  |  |  | $ 2.14 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exercised (in dollars per share) |  |  |  |  | $ 1.29 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Canceled and expired (in dollars per share) |  |  |  |  | $ 5.18 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Options outstanding, end of period (in dollars per share) |  |  |  |  | $ 3.22 |  | $ 3.29 |  |  |  |  |  |  |  |  |  |  |  |  |
Options vested and expected to vest as of March 31, 2014 |  |  |  |  | $ 3.22 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Options exercisable as of March 31, 2014 |  |  |  |  | $ 3.35 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Weighted average Remaining Contractual Life [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Options outstanding, beginning of period |  |  |  |  | 6 years 5 months 23 days |  | 6 years 8 months 16 days |  |  |  |  |  |  |  |  |  |  |  |  |
Options outstanding, end of period |  |  |  |  | 6 years 5 months 23 days |  | 6 years 8 months 16 days |  |  |  |  |  |  |  |  |  |  |  |  |
Options vested and expected to vest, end of period |  |  |  |  | 6 years 5 months 23 days |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Option exercisable, end of period |  |  |  |  | 5 years 3 months 14 days |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Aggregate Intrinsic Value [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Options outstanding, beginning of period |  |  |  |  | 893,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Options outstanding, end of period |  |  |  |  | 383,000 |  | 893,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Options vested and expected to vest, end of period |  |  |  |  | 383,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Options exercisable, end of period |  |  |  |  | 383,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Closing price (in dollars per share) |  |  |  |  | $ 2.14 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shares [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Non-vested, beginning of period (in shares) |  |  |  |  |  |  |  | 241,232 |  |  |  |  |  |  |  |  |  |  |  |
Granted (in shares) |  |  |  |  |  |  |  | 55,044 |  |  |  |  |  |  |  |  |  |  |  |
Vested (in shares) |  |  |  |  |  |  |  | (30,320) |  |  |  |  |  |  |  |  |  |  |  |
Non-vested, end of period (in shares) |  |  |  |  |  |  |  | 265,956 |  |  |  |  |  |  |  |  |  |  |  |
Weighted Average Grant Date Fair Value [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Non-vested, beginning of period (in dollars per share) |  |  |  |  |  |  |  | $ 3.44 |  |  |  |  |  |  |  |  |  |  |  |
Granted (in dollars per share) |  |  |  |  |  |  |  | $ 2.18 |  |  |  |  |  |  |  |  |  |  |  |
Vested (in dollars per share) |  |  |  |  |  |  |  | $ 3.96 |  |  |  |  |  |  |  |  |  |  |  |
Non-vested, end of period (in dollars per share) |  |  |  |  |  |  |  | $ 3.12 |  |  |  |  |  |  |  |  |  |  |  |
Unrecognized compensation expense related to restricted stock awards |  |  |  |  |  |  |  | $ 599,000 |  |  |  |  |  |  |  |  |  |  |  |
Weighted-average grant date fair value of stock options granted (in dollars per share) |  |  |  |  | $ 1.10 | $ 0 |  |  |  |  |  |  |  |  |  |  |  |  |  |

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- Definition The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2)(ii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(3) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Gross number of share options (or share units) granted during the period. + References No definition available. + Details
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- Definition The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding. + 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=6415400&loc=d3e5070-113901 + Details
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- Definition Number of options outstanding, including both vested and non-vested options. + 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=6415400&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Amount by which the current fair value of the underlying stock exceeds the exercise price of fully vested and expected to vest options outstanding. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition As of the balance sheet date, the number of shares into which fully vested and expected to vest stock options outstanding can be converted under the option plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition As of the balance sheet date, the weighted-average exercise price for outstanding stock options that are fully vested or expected to vest. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Weighted average price at which option holders acquired shares when converting their stock options into shares. + References No definition available. + Details
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- Definition Weighted average price at which grantees could have acquired the underlying shares with respect to stock options that were terminated. + References No definition available. + Details
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