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Debt Obligations, Convertible Senior Unsecured Notes (Details) - Convertible Senior Unsecured Notes - USD ($) | 1 Months Ended | 3 Months Ended | 9 Months Ended | 12 Months Ended |
--- | --- | --- | --- | --- | ---
Oct. 31, 2016 | Sep. 30, 2017 | Sep. 30, 2017 | Dec. 31, 2016 | Jan. 31, 2017
Debt Obligations |  |  |  |  |
Principal amount | $ 86,300,000 | $ 100,000,000 | $ 100,000,000 | $ 86,250,000 | $ 100,000,000
Additional principal amount |  |  |  |  | $ 13,800,000
Interest rate (as a percent) | 6.50% | 6.50% | 6.50% |  |
Proceeds received, net of estimated issuance costs | $ 95,800,000 |  |  |  |
Percentage of the Notes required to be repurchased if the agreement is fundamentally changed | 100.00% |  |  |  |
Conversion rate of the notes to common stock, per $1,000 principal amount of notes | 119.3033 |  | 120.0428 |  |
Conversion price per share of common stock | $ 8.38 | $ 8.33 | $ 8.33 |  |
Nonconvertible debt borrowing rate at the time of issuance (as a percent) |  |  | 7.50% |  |
Maturity period (in years) |  |  | 2 years | 2 years 9 months |
Unamortized Debt Discount |  | $ 1,809,470 | $ 1,809,470 | $ 2,119,436 |
Unamortized Deferred Financing Fees |  | 2,809,409 | 2,809,409 | 3,470,526 |
Net Carrying Value, Liability Component |  | 95,381,121 | 95,381,121 | 80,660,038 |
Net Carrying Value, Equity Component |  |  | 2,531,926 | $ 2,178,647 |
Total interest expense |  | 2,200,000 | 6,600,000 |  |
Interest expense related to cash coupon |  | 1,600,000 | 4,800,000 |  |
Deferred fees expensed as interest expense |  | 400,000 | 1,100,000 |  |
Debt discount |  | $ 200,000 | $ 700,000 |  |
Cost of the notes (as a percent) |  | 8.68% | 8.68% |  |
Over-Allotment Option |  |  |  |  |
Debt Obligations |  |  |  |  |
Principal amount | $ 11,300,000 |  |  |  |

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- Definition Adjustment to additional paid in capital resulting from the recognition of convertible debt instruments as two separate components - a debt component and an equity component. This bifurcation may result in a basis difference associated with the liability component that represents a temporary difference for purposes of applying accounting for income taxes. The initial recognition of deferred taxes for the tax effect of that temporary difference is as an adjustment to additional paid in capital. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 25 -Paragraph 22 -URI http://asc.fasb.org/extlink&oid=51819886&loc=SL6014347-161799 + Details
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