Summary of Significant Accounting Policies (Tables)

6 Months Ended

Jun. 30, 2014

Summary of Significant Accounting Policies (Tables) [Line Items]

Fair Value, Liabilities Measured on Recurring Basis [Table Text Block]

Warrant liability	Level 1	Level 2	Level 3
As of June 30, 2014	-	-	$	1,647
As of December 31, 2013	-	-	$	939

Schedule Of Reconciliation Of Warrants Liability Table Text Block

	Six Months Ended June 30,
	2014		2013
Balance at beginning of period	$	939	$	10
Issuance of common stock warrants		1,531		-
Exercise of common stock warrants		(2,505)		-
Remeasurement of common stock warrants		1,682		(6)
Balance at end of period	$	1,647	$	4

Supplier Concentration Risk [Member]

Summary of Significant Accounting Policies (Tables) [Line Items]

Schedules of Concentration of Risk, by Risk Factor [Table Text Block]

	Three Months Ended		Six Months Ended
	June 30,		June 30,
Vendor	2014	2013	2014	2013
A	7%	17%	17%	15%
B	19%	20%	24%	18%
C	10%	8%	10%	13%
D	12%	12%	13%	13%