Accrued Expenses and Other Current Liabilities (Tables)

3 Months Ended

Mar. 31, 2014

Accrued Expenses And Other Current Liabilities [Abstract]

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

	March 31, 2014		December 31,2013
Accrued salaries and benefits	$	1,089	$	1,232
Warrant liability		485		939
Liability for consigned precious metals		654		832
Accrued legal settlement and related expenses		783		616
Accrued severance and other charges		371		530
Accrued warranty		458		453
Other		1,594		1,400
Accrued expenses and other current liabilities	$	5,434	$	6,002