Condensed Consolidated Balance Sheets (Unaudited) (Parentheticals) (USD $)	Jun. 30, 2013	Dec. 31, 2012
Statement Of Financial Position [Abstract]
Accumulated depreciation on property, plant and equipment (in dollars)	$ 27,811,181	$ 27,394,851
Accumulated depreciation on leased property under capital lease (in dollars)	387,365	129,122
Series C redeemable convertible preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Series C redeemable convertible preferred stock, aggregate involuntary liquidation preference (in dollars)	$ 4,169,686	$ 0
Series C redeemable convertible preferred stock, shares authorized	10,431	0
Series C redeemable convertible preferred stock, shares issued	10,431	0
Series C redeemable convertible preferred stock, shares outstanding	10,431	0
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized	245,000,000	245,000,000
Common stock, shares issued	80,683,171	38,404,764
Treasury stock, shares	165,906	165,906