Summary of Significant Accounting Policies (Tables)

3 Months Ended

Mar. 31, 2014

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

Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block]

	March 31,
	2014	2013
Common stock options	635	786
RSUs	442	371
Warrants	340	923
Convertible notes	250	250
Total	1,667	2,330

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

As of March 31, 2014:	Level 1	Level 2		Level 3
Warrant liability	─	─	$	485
Warrant liability	─	─	$	485

As of December 31, 2013:	Level 1	Level 2		Level 3
Warrant liability	-	-	$	939
Warrant liability	-	-	$	939

Schedule of Reconciliation of Warrants Liability [Table Text Block]

	Three Months Ended March 31,
		2014		2013
Balance at beginning of period	$	939	$	10
Exercise of common stock warrants		(2,505)		─
Remeasurement of common stock warrants		2,051		(3)
Balance at end of period	$	485	$	7

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 March 31,
Vendor	2014	2013
A	19%	13%
B	18%	16%
C	6%	16%
D	9%	13%