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Stock-Based Compensation (Details) (USD $) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2014 | Mar. 31, 2013 | Dec. 31, 2013
Stock-based compensation in the form of employee stock options and restricted stock [Abstract] |  |  |
Total stock-based compensation | $ 292,000 | $ 332,000 |
Tax effect on stock-based compensation | 0 | 0 |
Net effect on net income (loss) | 292,000 | 332,000 |
Stock Options [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Compensation costs related to unvested stock options not yet recognized | 1,400,000 |  |
Value of estimated forfeitures | 92,000 |  |
Weighted-average period of amortization | 2 years 7 months 6 days |  |
Number of options outstanding [Roll Forward] |  |  |
Options outstanding, beginning of period (in shares) | 2,671,000 |  |
Granted (in shares) | 0 | 0 |
Exercised (in shares) | 0 |  |
Canceled and expired (in shares) | (74,000) |  |
Options outstanding, end of period (in shares) | 2,597,000 |  | 2,671,000
Options vested and expected to vest as of March 31, 2014 | 2,597,000 |  |
Options exercisable as of March 31, 2014 | 1,663,000 |  |
Weighted average exercise price [Roll Forward] |  |  |
Options outstanding, beginning of period (in dollars per share) | $ 3.29 |  |
Granted (in dollars per share) | $ 0 |  |
Exercised (in dollars per share) | $ 0 |  |
Canceled and expired (in dollars per share) | $ 5.18 |  |
Options outstanding, end of period (in dollars per share) | $ 3.24 |  | $ 3.29
Options vested and expected to vest as of March 31, 2014 | $ 3.24 |  |
Options exercisable as of March 31, 2014 | $ 3.30 |  |
Weighted average Remaining Contractual Life [Abstract] |  |  |
Options outstanding, beginning of period | 6 years 7 months 24 days |  | 6 years 8 months 16 days
Options outstanding, end of period | 6 years 7 months 24 days |  | 6 years 8 months 16 days
Options vested and expected to vest, end of period | 6 years 7 months 24 days |  |
Option exercisable, end of period | 5 years 5 months 5 days |  |
Aggregate Intrinsic Value [Abstract] |  |  |
Options outstanding, beginning of period | 893,000 |  |
Options outstanding, end of period | 438,000 |  | 893,000
Options vested and expected to vest, end of period | 438,000 |  |
Options exercisable, end of period | 438,000 |  |
Closing price (in dollars per share) | $ 2.20 |  |
Restricted Stock [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Weighted-average period of amortization | 2 years 3 months 18 days |  |
Shares [Roll Forward] |  |  |
Non-vested, beginning of period (in shares) | 241,232 |  |
Granted (in shares) | 0 |  |
Vested (in shares) | 0 |  |
Non-vested, end of period (in shares) | 241,232 |  |
Weighted Average Grant Date Fair Value [Roll Forward] |  |  |
Non-vested, beginning of period (in dollars per share) | $ 3.44 |  |
Granted (in dollars per share) | $ 0 |  |
Vested (in dollars per share) | $ 0 |  |
Non-vested, end of period (in dollars per share) | $ 3.44 |  |
Unrecognized compensation expense related to restricted stock awards | 581,000 |  |
Cost of revenue [Member] |  |  |
Stock-based compensation in the form of employee stock options and restricted stock [Abstract] |  |  |
Total stock-based compensation | 5,000 | 6,000 |
Selling, general and administrative [Member] |  |  |
Stock-based compensation in the form of employee stock options and restricted stock [Abstract] |  |  |
Total stock-based compensation | 244,000 | 284,000 |
Research and development [Member] |  |  |
Stock-based compensation in the form of employee stock options and restricted stock [Abstract] |  |  |
Total stock-based compensation | $ 43,000 | $ 42,000 |

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- Definition Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 14.F) -URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 14 -Section F + Details
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- Definition Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, 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 (i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The total recognized tax benefit related to compensation cost for equity-based payment arrangements recognized in income during 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 (h)(1)(i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target 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)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target 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)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date. + 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)(2)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The weighted average fair value of nonvested awards on equity-based plans excluding option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, revenue or profit achievement stock award plan) for which the employer is contingently obligated to issue equity instruments or transfer assets to an employee who has not yet satisfied service or performance criteria necessary to gain title to proceeds from the sale of the award or underlying shares or units. + 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)(2)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting 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 (c)(2)(iii)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement. + 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)(2)(iii)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + 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=6415400&loc=d3e5070-113901 + Details
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- Definition Weighted average remaining contractual term for vested portions of options outstanding and currently exercisable or convertible, 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 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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