Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2012

Accounting Policies [Abstract]

Held-to-maturity Securities [Table Text Block]

During the year ended December 31, 2011, the Company held investments in marketable securities that were classified as held to maturity and consisted of corporate bonds and certificates of deposits as follows (in thousands) :

	December 31, 2011
Purchase of short-term investments	$	(4,370	)
Amortization of premium on investments		57
Proceeds from short-term investments		4,293
Loss on sale of short-term investments		20
Fair value	$	-

Estimated Useful Life Of Assets [Table Text Block]

Property and equipment is recorded at cost and depreciated or amortized using the straight-line method over the estimated useful life of the asset or the underlying lease term for leasehold improvements, whichever is shorter. The estimated useful life by asset description is noted in the following table.

Asset Description	Estimated Useful Life
Office equipment and furniture	3-5  years
Laboratory equipment	7-10 years
Manufacturing equipment	10 years
Leasehold improvements and fixtures	Lesser of estimated useful or life of lease