Income Taxes (Details) - USD ($)
|
12 Months Ended |
Dec. 31, 2015 |
Dec. 31, 2014 |
| Income Taxes [Abstract] |
|
|
| Income tax benefit |
|
|
| Deferred tax assets: |
|
|
| Depreciation |
$ 113,000
|
$ 113,000
|
| Allowance for bad debts |
211,000
|
108,000
|
| Net operating loss carry-forwards |
23,628,000
|
25,469,000
|
| Stock option expense |
1,358,000
|
1,439,000
|
| Research and other credits |
1,154,000
|
1,031,000
|
| Other temporary differences |
15,000
|
15,000
|
| Total gross deferred tax assets |
26,479,000
|
28,175,000
|
| Less valuation allowance |
$ (26,479,000)
|
$ (28,175,000)
|
| Deferred Tax Assets, Net of Valuation Allowance |
|
|
| Operating Loss Carryforwards [Line Items] |
|
|
| Net operating loss carry-forward |
$ 67,000,000
|
|
| Research and other credit carry-forwards |
1,154,000
|
|
| Decrease in valuation allowance |
$ 1,696,000
|
|
| Earliest Tax Year [Member] |
|
|
| Operating Loss Carryforwards [Line Items] |
|
|
| Net operating loss carry-forward expiration dates |
Dec. 31, 2016
|
|
| Research and other credit carry-forwards expiration dates |
Dec. 31, 2016
|
|
| Latest Tax Year [Member] |
|
|
| Operating Loss Carryforwards [Line Items] |
|
|
| Net operating loss carry-forward expiration dates |
Dec. 31, 2035
|
|
| Research and other credit carry-forwards expiration dates |
Dec. 31, 2035
|
|