Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2013

Property, Plant and Equipment

Property, plant and equipment, including those held under capital lease, are stated at cost. Depreciation is computed by use of the straight-line method over the estimated useful lives of the assets, or the lease term if shorter, as follows:


Building and improvements			3 - 20 years
Machinery and equipment			3 - 10 years
Furniture and fixtures			3 - 10 years

Basic and Dilutive Net Loss per Share Computations

The following are the basic and dilutive net loss per share computations for the last three fiscal years:


	2013			2012			2011
Net loss	$	(26,439,159	)	$	(28,491,153	)	$	(21,328,536	)
Weighted average shares outstanding used to compute basic and diluted net loss per share		43,422,001			28,824,417			14,187,885
Basic and diluted net loss per share	$	(0.61	)	$	(0.99	)	$	(1.50	)

Outstanding Options, Warrants and Restricted Stock Units

Outstanding options, warrants and restricted stock units were excluded from the computation of diluted net loss per share because the effect would have been anti-dilutive for all periods presented below:


	2013		2012		2011
Outstanding options		428,258		447,359		875,498
Restricted stock units		3,326,282		1,534,200		357,541
Outstanding warrants		16,267,659		9,935,912		17,434,483

Total		20,022,199		11,917,471		18,667,522

Summary of Components of Accumulated OCI

The components of our accumulated OCI, as of December 31 of each year shown, are as follows:


	2013		2012
Net unrealized gain (loss) on marketable securities	$	—	$	(1,356	)
Unrealized gain on foreign currency translation		252,101		194,533

Accumulated other comprehensive income	$	252,101	$	193,177