Condensed Consolidated Balance Sheets (Unaudited) (USD $) In Thousands	Sep. 30, 2011	Dec. 31, 2010
Current assets:
Cash and cash equivalents	$ 66,889	$ 49,279
Accounts receivable, less allowance of $325 in 2011 and $309 in 2010	31,963	38,825
Inventories, net	36,461	35,489
Deferred tax assets	2,343	2,164
Other current assets	3,034	2,397
Total current assets	140,690	128,154
Long-term investments, net	11,613	18,417
Property, plant and equipment, net	48,857	50,848
Long-term deferred tax assets, net	2,320	2,805
Other assets	4,504	4,688
Total assets	207,984	204,912
Current liabilities:
Accounts payable	8,732	11,999
Accrued compensation and benefits	8,354	6,772
Accrued expenses	2,606	3,138
Income taxes payable	317	102
Deferred revenue	760	689
Total current liabilities	20,769	22,700
Long-term deferred revenue	2,268	2,178
Long-term income taxes payable	1,076	1,022
Commitments and contingencies (Note 11)
Vicor Corporation stockholders' equity:
Common Stock	386	385
Additional paid-in capital	165,499	163,933
Retained earnings	135,685	133,791
Accumulated other comprehensive loss	(362)	(1,369)
Treasury stock, at cost	(121,827)	(121,827)
Total Vicor Corporation stockholders' equity	179,499	175,031
Noncontrolling interest	4,372	3,981
Total equity	183,871	179,012
Total liabilities and equity	207,984	204,912
Common Class B
Vicor Corporation stockholders' equity:
Common Stock	$ 118	$ 118