Fair Value Measurements - Schedule of Quantitative Information Level 3 Fair Value Measurements (Details) - 6 months ended Jun. 30, 2015 - Fair Value, Measurements, Recurring [Member] - USD ($) $ in Thousands	Total
Fair Value Asset	Earn-out receivable related to transfer of test handler product line
Fair value of assets, valuation technique	Discounted cash flow
Unobservable input projected revenue	$ 21
Unobservable input revenue growth rates, Maximum	0.00%
Unobservable input performance weighted average, Minimum	60.00%
Unobservable input performance weighted average, Maximum	125.00%
Unobservable input discount rate	10.00%