Consolidated Balance Sheets (Parentheticals) - USD ($) $ in Thousands |
Sep. 30, 2016 |
Dec. 31, 2015 |
|---|---|---|
| Consolidated Balance Sheets | ||
| Property, plant, and equipment, accumulated depreciation | $ 29,204 | $ 27,970 |
| Leased property under capital lease, accumulated depreciation | 3,280 | 1,700 |
| Accumulated amortization | $ 921 | $ 469 |
| Series C redeemable convertible Preferred Stock, par value (in dollars per share) | $ 0.01 | $ 0.01 |
| Series C redeemable convertible Preferred Stock, shares authorized | 10,431 | 10,431 |
| Series C redeemable convertible Preferred Stock, shares issued | 5,231 | 5,231 |
| Series C redeemable convertible Preferred Stock, shares outstanding | 5,231 | 5,231 |
| Series C redeemable convertible Preferred Stock, aggregate involuntary liquidation preference (in dollars) | $ 16,664 | $ 16,664 |
| Common Stock, par value (in dollars per share) | $ 0.01 | $ 0.01 |
| Common Stock, shares authorized | 450,000,000 | 450,000,000 |
| Common Stock, shares issued | 181,009,135 | 180,567,444 |
| Common stock in treasury, shares | 577,376 | 479,953 |