Note F - Debt Obligations (Details Textual) - USD ($)
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12 Months Ended |
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Feb. 09, 2016 |
Jun. 02, 2014 |
Dec. 31, 2016 |
Jun. 30, 2016 |
Apr. 30, 2015 |
Dec. 31, 2013 |
| Series D Redeemable Convertible Preferred Stock [Member] |
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| Class of Warrant or Right, Number of Securities Called by Warrants or Rights |
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15,499,324
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1,079,453
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| 2021 Notes [Member] |
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| Debt Instrument, Convertible, Conversion Price |
$ 17.11
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| Debt Instrument, Face Amount |
$ 86,250,000
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| Debt Instrument, Interest Rate, Stated Percentage |
5.50%
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| Proceeds from Debt, Net of Issuance Costs |
$ 82,800,000
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| Repayments of Long-term Debt |
$ 18,600,000
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| Debt Conversion, Converted Instrument, Shares Issued |
58.4454
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| Debt Conversion, Original Debt, Amount |
$ 1,000
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| Debt Instrument Repurchase Price Equal to Percentage of Principal Amount |
100.00%
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| Debt Instrument, Sinking Fund Payment |
$ 0
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| Deerfield Facility Agreement [Member] |
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| Line of Credit Facility, Maximum Borrowing Capacity |
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$ 60,000,000
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| Line of Credit Facility, Interest Rate at Period End |
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9.75%
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| Debt Covenant, Debt Financing Restriction |
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$ 750,000
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| Deerfield Facility Agreement [Member] | IPO [Member] |
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| Reclassification of Common Stock Shares |
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256,410
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| Deerfield Facility Agreement [Member] | Deerfield Warrant [Member] |
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| Class of Warrant or Right, Exercise Price of Warrants or Rights |
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$ 0.78
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| Deerfield Facility Agreement [Member] | Deerfield Warrant [Member] | IPO [Member] |
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| Class of Warrant or Right, Number of Securities Called by Warrants or Rights |
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1,923,077
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| Deerfield Facility Agreement [Member] | Series D Redeemable Convertible Preferred Stock [Member] |
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| Class of Warrant or Right, Number of Securities Called by Warrants or Rights |
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14,423,076
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| Own-share Lending Arrangement, Shares, Issued |
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1,923,077
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| Mandatorily Redeemable Preferred Stock, Fair Value Disclosure |
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$ 1,500,000
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| Deerfield Facility Agreement [Member] | Term Notes [Member] |
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| Proceeds from Secured Notes Payable |
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15,000,000
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| Deerfield Facility Agreement [Member] | Deerfield Convertible Notes [Member] |
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| Proceeds from Secured Notes Payable |
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$ 10,000,000
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| Debt Instrument, Convertible, Conversion Price |
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$ 5.85
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| Third Line of Credit Agreement [Member] | City National Bank of Florida [Member] |
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| Line of Credit Facility, Maximum Borrowing Capacity |
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$ 1,100,000
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| Line of Credit Facility, Remaining Borrowing Capacity |
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$ 400,000
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| Long-term Line of Credit |
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$ 0
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| Third Line of Credit Agreement [Member] | City National Bank of Florida [Member] | Prime Rate [Member] |
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| Debt Instrument, Interest Rate, Stated Percentage |
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2.77%
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| Debt Instrument, Basis Spread on Variable Rate |
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2.00%
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