Composition of Certain Balance Sheet Items (Tables)

12 Months Ended

Dec. 31, 2014

Composition of Certain Balance Sheet Items [Abstract]

Schedule of Property and Equipment

Depreciation and amortization periods for the Company’s property, plant and equipment are as follows: 

	Useful Life
Machinery and equipment	4-7 years
Leasehold improvements	Shorter of expected useful life or lease term
Purchased computer software	4 years

Property and Equipment, net

Property and equipment, net consisted of the following (in thousands):

	December 31
	2014			2013
Machinery and equipment	$	5,481		$	5,649
Leasehold improvements	2,214			1,927
Purchased computer software	137			85
	7,832			7,661
Less: accumulated depreciation and amortization	(4,711		)	(4,289		)
Property and equipment, net	$	3,121		$	3,372

Schedule of Other Current Liabilities

Other Current Liabilities

Other current liabilities consisted of the following (in thousands):

	December 31
	2014		2013
Payroll and related expenses	$	3,138	$	2,800
Professional services	1,169		616
Deferred rent	172		138
Accrued offering costs	—		82
Other	496		254
Other current liabilities	$	4,975	$	3,890