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Shareholders' Equity (Details) (USD $) | 3 Months Ended | 6 Months Ended | 9 Months Ended
--- | --- | --- | ---
Sep. 30, 2012 | Jun. 30, 2012 | Sep. 30, 2012
Class of Stock [Line Items] |  |  |
Shares issued of common stock (in shares) |  |  | 66,070
Changes in common stock [Roll Forward] |  |  |
Balance |  | $ 126,781,000 | $ 126,781,000
Balance | 123,718,000 |  | 123,718,000
Weighted Average Exercise Price [Roll Forward] |  |  |
Granted (in dollars per share) | $ 2.32 |  |
Employee Stock Options [Member] |  |  |
Changes in common stock [Roll Forward] |  |  |
Exercise of options (in shares) |  |  | 4,167
Options [Roll Forward] |  |  |
Outstanding beginning balance (in shares) |  | 2,318,399 | 2,318,399
Granted (in shares) |  |  | 150,000
Forfeited (in shares) |  |  | 0
Expired (in shares) |  |  | (105,000)
Exercised (in shares) |  |  | (4,167)
Outstanding ending balance (in shares) | 2,359,232 |  | 2,359,232
Exercisable (in shares) | 2,209,232 |  | 2,209,232
Weighted Average Exercise Price [Roll Forward] |  |  |
Beginning Balance (in dollars per share) |  | $ 3.94 | $ 3.94
Granted (in dollars per share) |  |  | $ 2.32
Forfeited (in dollars per share) |  |  | $ 0
Expired (in dollar per share) |  |  | $ 4.39
Exercised (in dollars per share) |  |  | $ 2.52
Ending Balance (in dollars per share) | $ 3.82 |  | $ 3.82
Exercisable (in dollars per share) | $ 3.92 |  | $ 3.92
Weighted Average Remaining Contractual Life - Years |  |  | 4 years 7 months 17 days
Aggregate intrinsic value of options / warrants outstanding | 0 |  | 0
Term of plan |  |  | 3 years
Term of expiry of plan |  |  | 10 years
Risk free interest rate (in hundredths) |  |  | 0.815%
Expected life |  |  | 6 years
Expiration date of plan |  |  | Dec. 06, 2011
Expected volatility rate (in hundredths) |  |  | 61.87%
Compensation expense | 15,000 |  | 17,000
Unrecognized compensation expense | 181,000 |  | 181,000
Director Stock Options [Member] |  |  |
Changes in common stock [Roll Forward] |  |  |
Exercise of options (in shares) |  |  | 20,000
Options [Roll Forward] |  |  |
Outstanding beginning balance (in shares) |  | 210,000 | 210,000
Granted (in shares) | 10,000 | 70,000 | 80,000
Forfeited (in shares) |  |  | 0
Expired (in shares) |  |  | (120,000)
Exercised (in shares) |  |  | (20,000)
Outstanding ending balance (in shares) | 150,000 |  | 150,000
Exercisable (in shares) | 63,335 |  | 63,335
Weighted Average Exercise Price [Roll Forward] |  |  |
Beginning Balance (in dollars per share) |  | $ 3.10 | $ 3.10
Granted (in dollars per share) |  | $ 2.85 | $ 2.78
Forfeited (in dollars per share) |  |  | $ 0
Expired (in dollar per share) |  |  | $ 3.05
Exercised (in dollars per share) |  |  | $ 2.52
Ending Balance (in dollars per share) | $ 3.05 |  | $ 3.05
Exercisable (in dollars per share) | $ 3.01 |  | $ 3.01
Weighted Average Remaining Contractual Life - Years |  |  | 8 years 4 months 6 days
Aggregate intrinsic value of options / warrants outstanding | 0 |  | 0
Term of plan |  |  | 3 years
Risk free interest rate, minimum (in hundredths) |  |  | 1.13%
Risk free interest rate, maximum (in hundredths) |  |  | 1.41%
Expected life |  |  | 6 years
Expected volatility rate, minimum (in hundredths) |  |  | 62.75%
Expected volatility rate, maximum (in hundredths) |  |  | 63.59%
Compensation expense | 16,000 |  | 53,000
Unrecognized compensation expense | 128,000 |  | 128,000
Options vested over period (in shares) |  |  | 60,000
Director Stock Options [Member] | Options vesting immediately [Member] |  |  |
Weighted Average Exercise Price [Roll Forward] |  |  |
Term of expiry of plan |  |  | 10 years
Maximum period allowed for expiry of options for board members no longer serving the board |  |  | 1 year
Options vested immediately (in shares) |  |  | 10,000
Director Stock Options [Member] | Options vesting over a three year period [Member] |  |  |
Weighted Average Exercise Price [Roll Forward] |  |  |
Term of expiry of plan |  |  | 10 years
Maximum period allowed for expiry of options for board members no longer serving the board |  |  | 1 year
Director Stock Options [Member] | Minimum [Member] |  |  |
Weighted Average Exercise Price [Roll Forward] |  |  |
Expected life |  |  | 5 years
Director Stock Options [Member] | Maximum [Member] |  |  |
Weighted Average Exercise Price [Roll Forward] |  |  |
Expected life |  |  | 6 years
Common Stock [Member] |  |  |
Changes in common stock [Roll Forward] |  |  |
Balance |  | 274,000 | 274,000
Balance (in shares) |  | 27,409,908 | 27,409,908
2001 stock compensation plan |  |  | 1,000
2001 stock compensation plan (in shares) |  |  | 45,000
Expense of employee options vesting |  |  | 0
Expense of outside director warrants vesting |  |  | 0
Balance | 275,000 |  | 275,000
Balance (in shares) | 27,475,978 |  | 27,475,978
Common Stock [Member] | Employee Stock Options [Member] |  |  |
Changes in common stock [Roll Forward] |  |  |
Exercise of options |  |  | 0
Exercise of options (in shares) |  |  | 1,070
Options [Roll Forward] |  |  |
Exercised (in shares) |  |  | (1,070)
Common Stock [Member] | Director Stock Options [Member] |  |  |
Changes in common stock [Roll Forward] |  |  |
Exercise of options |  |  | 0
Exercise of options (in shares) |  |  | 20,000
Options [Roll Forward] |  |  |
Exercised (in shares) |  |  | (20,000)
Additional Paid-In Capital [Member] |  |  |
Changes in common stock [Roll Forward] |  |  |
Balance |  | 122,523,000 | 122,523,000
2001 stock compensation plan |  |  | 130,000
Expense of employee options vesting |  |  | 16,000
Expense of outside director warrants vesting |  |  | 53,000
Balance | 122,772,000 |  | 122,772,000
Additional Paid-In Capital [Member] | Employee Stock Options [Member] |  |  |
Changes in common stock [Roll Forward] |  |  |
Exercise of options |  |  | 0
Additional Paid-In Capital [Member] | Director Stock Options [Member] |  |  |
Changes in common stock [Roll Forward] |  |  |
Exercise of options |  |  | $ 50,000

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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 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph e(2)(b) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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- Definition The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently 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 (c)(1)(iii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph b(1)(c), d(2) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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- Definition Number of options or other stock instruments for which the right to exercise has lapsed under the terms of the plan agreements. + 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)(4) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph b(1)(g) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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- Definition Amount of difference between fair value of the underlying shares reserved for issuance and 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 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph d(1) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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- Definition The number of shares reserved for issuance under stock option agreements awarded under the plan that validly exist and are outstanding as of the balance sheet date, including vested options. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph b(1)(b) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: 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 3: 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 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph b(1)(a) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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