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Stockholders' Equity - Stock Options (Details) - USD ($) |  |  |  |  |  |  |  |  |  | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Sep. 28, 2020 | Aug. 21, 2020 | Apr. 15, 2020 | Apr. 01, 2020 | Mar. 31, 2020 | Mar. 13, 2020 | Feb. 28, 2020 | Jan. 31, 2020 | Jan. 01, 2020 | Sep. 30, 2020 | Sep. 30, 2019 | Sep. 30, 2020 | Sep. 30, 2019 | Dec. 31, 2019
Number of Options |  |  |  |  |  |  |  |  |  |  |  |  |  |
Outstanding, beginning balance (in shares) |  |  |  |  |  |  |  |  | 7,222,625 |  |  | 7,222,625 |  |
Granted (in shares) |  |  |  |  |  |  |  |  |  |  |  | 481,250 |  |
Canceled (in shares) |  |  |  |  |  |  |  |  |  |  |  | 0 |  |
Exercised (in shares) |  |  |  |  |  |  |  |  |  |  |  | 0 |  |
Expired/Forfeited (in shares) |  |  |  |  |  |  |  |  |  |  |  | (200,000) |  |
Outstanding, ending balance (in shares) |  |  |  |  |  |  |  |  |  | 7,503,875 |  | 7,503,875 |  | 7,222,625
Exercisable (in shares) |  |  |  |  |  |  |  |  |  | 3,067,125 |  | 3,067,125 |  |
Weighted Average Exercise Price |  |  |  |  |  |  |  |  |  |  |  |  |  |
Outstanding, beginning balance (in dollars per share) |  |  |  |  |  |  |  |  | $ 3.33 |  |  | $ 3.33 |  |
Granted (in dollars per share) |  |  |  |  |  |  |  |  |  |  |  | 1.43 |  |
Canceled (in dollars per share) |  |  |  |  |  |  |  |  |  |  |  | 0.00 |  |
Exercised (in dollars per share) |  |  |  |  |  |  |  |  |  |  |  | 0.00 |  |
Expired/Forfeited (in dollars per share) |  |  |  |  |  |  |  |  |  |  |  | 1.55 |  |
Outstanding, ending balance (in dollars per share) |  |  |  |  |  |  |  |  |  | $ 3.26 |  | 3.26 |  | $ 3.33
Exercisable (in dollars per share) |  |  |  |  |  |  |  |  |  | $ 4.92 |  | $ 4.92 |  |
Other disclosures |  |  |  |  |  |  |  |  |  |  |  |  |  |
Outstanding Weighted Average Remaining Contractual Life (in Years) |  |  |  |  |  |  |  |  |  |  |  | 5 years 22 days |  | 5 years 9 months 26 days
Exercisable Weighted Average Remaining Contractual Life (in Years) |  |  |  |  |  |  |  |  |  |  |  | 1 year 5 months 12 days |  |
Aggregate Intrinsic Value, Outstanding |  |  |  |  |  |  |  |  |  | $ 0 |  | $ 0 |  | $ 0
Aggregate Intrinsic Value, Exercisable |  |  |  |  |  |  |  |  |  | 0 |  | $ 0 |  |
Board Observer |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of Options |  |  |  |  |  |  |  |  |  |  |  |  |  |
Granted (in shares) |  |  |  |  |  |  |  |  | 5,000 |  |  |  |  |
Weighted Average Exercise Price |  |  |  |  |  |  |  |  |  |  |  |  |  |
Granted (in dollars per share) |  |  |  |  |  |  |  |  | $ 4.00 |  |  |  |  |
Other disclosures |  |  |  |  |  |  |  |  |  |  |  |  |  |
Vesting percentage per year |  |  |  |  |  |  |  |  | 50.00% |  |  |  |  |
Consultant |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of Options |  |  |  |  |  |  |  |  |  |  |  |  |  |
Granted (in shares) |  | 22,750 | 13,500 |  |  |  |  | 75,000 |  |  |  |  |  |
Weighted Average Exercise Price |  |  |  |  |  |  |  |  |  |  |  |  |  |
Granted (in dollars per share) |  | $ 1.00 | $ 3.00 |  |  |  |  | $ 1.57 |  |  |  |  |  |
Other disclosures |  |  |  |  |  |  |  |  |  |  |  |  |  |
Awards that vested (as a percent) |  |  |  |  |  |  |  |  |  |  |  | 33.33% |  |
Vesting percentage per year |  |  | 33.33% |  |  |  |  |  |  |  |  |  |  |
Employee |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of Options |  |  |  |  |  |  |  |  |  |  |  |  |  |
Granted (in shares) | 15,000 |  |  |  | 50,000 |  | 50,000 |  |  |  |  |  |  |
Weighted Average Exercise Price |  |  |  |  |  |  |  |  |  |  |  |  |  |
Granted (in dollars per share) | $ 0.71 |  |  |  | $ 0.61 |  | $ 1.40 |  |  |  |  |  |  |
Other disclosures |  |  |  |  |  |  |  |  |  |  |  |  |  |
Vesting percentage per year | 33.33% |  |  |  | 33.33% |  |  |  |  |  |  |  |  |
A certain key employee |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of Options |  |  |  |  |  |  |  |  |  |  |  |  |  |
Granted (in shares) |  |  |  |  |  | 50,000 |  |  |  |  |  |  |  |
Weighted Average Exercise Price |  |  |  |  |  |  |  |  |  |  |  |  |  |
Granted (in dollars per share) |  |  |  |  |  | $ 5.50 |  |  |  |  |  |  |  |
Non Management Directors |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of Options |  |  |  |  |  |  |  |  |  |  |  |  |  |
Granted (in shares) |  |  |  | 200,000 |  |  |  |  |  |  |  |  |  |
Weighted Average Exercise Price |  |  |  |  |  |  |  |  |  |  |  |  |  |
Granted (in dollars per share) |  |  |  | $ 0.50 |  |  |  |  |  |  |  |  |  |
Other disclosures |  |  |  |  |  |  |  |  |  |  |  |  |  |
Vesting percentage per year |  |  |  | 50.00% |  |  |  |  |  |  |  |  |  |
Employee Stock Option |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of Options |  |  |  |  |  |  |  |  |  |  |  |  |  |
Granted (in shares) |  |  |  |  |  |  |  |  |  |  |  | 481,250 |  |
Employee Stock Option |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other disclosures |  |  |  |  |  |  |  |  |  |  |  |  |  |
Compensation expense |  |  |  |  |  |  |  |  |  | 45,000 | $ 66,000 | $ 158,000 | $ 382,000 |
Unrecognized compensation expense |  |  |  |  |  |  |  |  |  | $ 204,000 |  | $ 204,000 |  |
Weighted average period of recognition |  |  |  |  |  |  |  |  |  |  |  | 1 year 2 months 27 days |  |
Employee Stock Option | Five year expiration |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stockholders' Equity |  |  |  |  |  |  |  |  |  |  |  |  |  |
Expiration period |  |  |  |  |  |  |  |  |  |  |  | 5 years |  |
Employee Stock Option | Seven year expiration |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stockholders' Equity |  |  |  |  |  |  |  |  |  |  |  |  |  |
Expiration period |  |  |  |  |  |  |  |  |  |  |  | 7 years |  |
Employee Stock Option | Ten year expiration |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stockholders' Equity |  |  |  |  |  |  |  |  |  |  |  |  |  |
Expiration period |  |  |  |  |  |  |  |  |  |  |  | 10 years |  |

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