Consolidated Balance Sheets (Parentheticals) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Property, plant, and equipment, accumulated depreciation	$ 30,129	$ 29,666
Leased property under capital lease, accumulated depreciation	6,083	4,544
Accumulated amortization	$ 1,185	$ 1,032
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	191,780,048	191,723,974
Common stock in treasury, shares	582,328	582,328
Series C Redeemable Convertible Preferred Stock
Redeemable convertible Preferred Stock, par value (in dollars per share)	$ 0.01	$ 0.01
Redeemable convertible Preferred Stock, shares authorized	10,431	10,431
Redeemable convertible Preferred Stock, shares issued	5,231	5,231
Redeemable convertible Preferred Stock, shares outstanding	5,231	5,231
Redeemable convertible Preferred Stock, aggregate involuntary liquidation preference (in dollars)	$ 16,664	$ 16,664
Series D Redeemable Convertible Preferred Stock
Redeemable convertible Preferred Stock, par value (in dollars per share)	$ 0.01	$ 0.01
Redeemable convertible Preferred Stock, shares authorized	5,000,000	5,000,000
Redeemable convertible Preferred Stock, shares issued	14,800	18,500
Redeemable convertible Preferred Stock, shares outstanding	14,800	18,500
Redeemable convertible Preferred Stock, aggregate involuntary liquidation preference (in dollars)	$ 14,800	$ 18,500