Valuation and Qualifying Accounts

12 Months Ended

Dec. 31, 2014

Valuation and Qualifying Accounts [Abstract]

Valuation and Qualifying Accounts

VICOR CORPORATION

SCHEDULE II

VALUATION AND QUALIFYING ACCOUNTS

Years ended December 31, 2014, 2013 and 2012

Description	Balance at Beginning of Period		Charge to Costs and Expenses		Other Charges, Deductions (1)			Balance at End of Period
Allowance for doubtful accounts:
Year ended:
December 31, 2014	$	198,000	$	66,000	$	(81,000	)	$	183,000
December 31, 2013		292,000		255,000		(349,000	)		198,000
December 31, 2012		266,000		37,000		(11,000	)		292,000

(1) Reflects uncollectible accounts written off, net of recoveries.