Consolidated Balance Sheets (Parentheticals) - USD ($)	Dec. 31, 2016	Dec. 31, 2015
Property, plant, and equipment, accumulated depreciation	$ 29,666,000	$ 27,970,000
Leased property under capital lease, accumulated depreciation	4,544,000	1,700,000
Accumulated amortization	$ 1,032,000	$ 469,000
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	191,723,974	180,567,444
Common stock in treasury, shares	582,328	479,953
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	18,500	0
Redeemable convertible Preferred Stock, shares outstanding	18,500
Redeemable convertible Preferred Stock, aggregate involuntary liquidation preference (in dollars)	$ 18,500,000	$ 18,500,000