Accrued Expenses and Other Current Liabilities (Tables)

6 Months Ended

Jun. 30, 2014

Accrued Expenses And Other Current Liabilities [Abstract]

Schedule of Accrued Expenses and Other Current Liabilities [Table Text Block]

	June 30, 2014		December 31, 2013
Accrued salaries and benefits	$	1,134	$	1,232
Warrant liability		1,647		939
Liability for consigned precious metals		478		832
Accrued legal settlement and related expenses		-		616
Accrued severance and other charges		254		530
Accrued warranty		485		453
Other		1,688		1,400
Accrued expenses and other current liabilities	$	5,686	$	6,002