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Wind-Down and Exit Costs (Details) (USD $) | 12 Months Ended
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Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
Summary of changes to our wind-down reserve |  |  |
Add deferred rent at period end | $ (85,572) | $ (1,302,543) | $ 129,764
Facility Closing In Rhode Island [Member] |  |  |
Summary of changes to our wind-down reserve |  |  |
Accrued wind-down reserve at beginning of period |  | 1,683,000 | 2,644,000
Less actual expenses recorded against estimated reserve during the period | (1,185,000) | (1,248,000) |
Additional expense recorded to revise estimated reserve at period-end | 356,000 | 287,000 |
Revised reserve at period-end | 854,000 | 1,683,000 |
Add deferred rent at period end | 249,000 | 452,000 |
Total accrued wind-down expenses at period-end (current and non current) | 1,103,000 | 2,135,000 |
Accrued wind-down expenses, current portion | 1,103,000 | 1,361,000 |
Accrued wind-down expenses, non-current |  | $ 774,000 |

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- Details
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