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Long-term Debt (Details) |  |  |  |  |  |  | 6 Months Ended |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Jul. 10, 2017 | May 01, 2017 $ / shares shares | Apr. 01, 2017 USD ($) $ / shares | Dec. 14, 2016 USD ($) $ / shares | Aug. 22, 2016 USD ($) election $ / shares | May 10, 2016 USD ($) $ / shares shares | Jun. 30, 2017 USD ($) $ / shares shares | Aug. 07, 2017 | Mar. 31, 2017 USD ($) | Dec. 31, 2016 USD ($) $ / shares shares | Jul. 29, 2016 $ / shares | Jun. 28, 2016 $ / shares | May 08, 2013 $ / shares
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Exercise price (usd per share) | $ / shares |  |  |  |  |  | $ 30.20 | $ 79.40 |  |  | $ 79.40 | $ 8.60 | $ 8.60 | $ 49.40
Debt instrument, covenant, compensating cash balance |  |  |  |  |  |  |  |  | $ 13,200,000 |  |  |  |
Common stock, shares outstanding | shares |  | 37,435,524 |  |  |  |  | 37,435,524 |  |  | 15,190,473 |  |  |
Common stock, shares issued | shares |  |  |  |  |  |  | 37,469,274 |  |  | 15,224,223 |  |  |
Outstanding principle |  |  |  |  |  |  | $ 13,171,702 |  |  | $ 17,621,702 |  |  |
Current portion of long-term debt |  |  |  |  |  |  | 13,025,180 |  |  | 16,397,030 |  |  |
Unamortized discount and debt issuance costs |  |  |  |  |  |  | 146,552 |  |  | $ 1,224,672 |  |  |
Principle redeemed |  |  |  |  |  |  | $ 4,450,000 |  |  |  |  |  |
Shares issued for debt, shares | shares |  |  |  |  |  |  | 4,497,466 |  |  |  |  |  |
Securities Purchase Agreement | Secured Debt |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Principle amount of debt |  |  |  |  |  | $ 25,530,000 |  |  |  |  |  |  |
Fixed coupon rate |  |  |  |  |  | 6.375% |  |  |  |  |  |  |
Number of shares availabe from warrants | shares |  |  |  |  |  | 100,000 |  |  |  |  |  |  |
Exercise price (usd per share) | $ / shares |  |  |  |  |  | $ 0.0001 |  |  |  |  |  |  |
Proceeds from issuance of debt and warrants |  |  |  |  |  | $ 23,400,000 |  |  |  |  |  |  |
Debt principal that could be redeemed |  |  |  |  |  | $ 1,100,000 |  |  |  |  |  |  |
Delivery discount percentage |  |  |  |  |  | 7.50% |  |  |  |  |  |  |
Duration of average market price used for warrant exercise price |  |  |  |  |  | 3 days |  |  |  |  |  |  |
Discount to the prior trading day’s volume weighted average price |  |  |  |  |  | 7.50% |  |  |  |  |  |  |
Minimum price condition (per share) | $ / shares |  |  |  |  |  | $ 15.00 |  |  |  |  |  |  |
Debt instrument, covenant, compensating cash balance |  |  |  |  |  | $ 24,000,000 |  |  |  |  |  |  |
Percentage of VWAPs |  |  |  |  |  | 92.50% |  |  |  |  |  |  |
Amendment Agreement | Secured Debt |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Fixed coupon rate |  |  |  |  | 9.00% |  |  |  |  |  |  |  |
Debt principal that could be redeemed |  |  |  |  | $ 1,500,000 |  |  |  |  |  |  |  |
Minimum price condition (per share) | $ / shares |  |  |  |  | $ 4.00 |  |  |  |  |  |  |  |
Final payment of interest |  |  |  |  | $ 765,900 |  |  |  |  |  |  |  |
Maximum prepayment of principle if demanded |  |  |  |  | $ 18,500,000 |  |  |  |  |  |  |  |
Premium on outstanding prepayment amount |  |  |  |  | 10.00% |  |  |  |  |  |  |  |
Common stock trading price threshold for debt redemption | $ / shares |  |  |  |  | $ 8.00 |  |  |  |  |  |  |  |
Debt principal that could be redeemed based on common stock price |  |  |  |  | $ 2,200,000 |  |  |  |  |  |  |  |
Number of elections company can make to redeem debt in year | election |  |  |  |  | 3 |  |  |  |  |  |  |  |
Debt principal that could be redeemed based on company's elections |  |  |  |  | $ 2,500,000 |  |  |  |  |  |  |  |
Price per share that holder can convert outstanding debt balance | $ / shares |  |  |  |  | $ 12.00 |  |  |  |  |  |  |  |
Debt instrument, covenant, compensating cash balance |  |  |  |  | $ 18,500,000 |  |  |  |  |  |  |  |
First Waiver | Secured Debt |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Minimum price condition (per share) | $ / shares |  |  | $ 0.30 | $ 1.00 |  |  |  |  |  |  |  |  |
Debt instrument, covenant, compensating cash balance |  |  |  | $ 18,500,000 |  |  |  |  |  |  |  |  |
Cash in excess of debenture |  |  | $ 10,000,000 | 10,000,000 |  |  |  |  |  |  |  |  |
Redemption payments |  |  |  | $ 1,500,000 |  |  |  |  |  |  |  |  |
Daily closing share price appreciation |  |  |  | 25.00% |  |  |  |  |  |  |  |  |
2017 Amendment Agreement | Secured Debt |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Minimum price condition (per share) | $ / shares |  | $ 0.35 |  |  |  |  |  |  |  |  |  |  |
Common stock, shares issued | shares |  | 9,131,868 |  |  |  |  |  |  |  |  |  |  |
Number of convertible shares | shares |  | 45,000,000 |  |  |  |  |  |  |  |  |  |  |
Series A Warrant | Common Stock | Securities Purchase Agreement | Secured Debt |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Exercise price (usd per share) | $ / shares |  |  |  |  |  | $ 30.20 |  |  |  |  |  |  |
Series A Warrant | Common Stock | Amendment Agreement | Secured Debt |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Exercise price (usd per share) | $ / shares |  |  |  |  | $ 8.60 |  |  |  |  |  |  |  |
Subsequent Event | Secured Debt |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Redemption limit on any given day, percentage of daily dollar trading volume |  |  |  |  |  |  |  | 15.00% |  |  |  |  |
Subsequent Event | July 2017 Amendment Agreement | Secured Debt |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Delivery discount percentage | 20.00% |  |  |  |  |  |  |  |  |  |  |  |
Percentage of VWAPs | 80.00% |  |  |  |  |  |  |  |  |  |  |  |
Number of days average for exercise price | 20 days |  |  |  |  |  |  |  |  |  |  |  |
Percentage of prior day VMAP | 115.00% |  |  |  |  |  |  |  |  |  |  |  |

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