Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 42,678	$ 44,230
Accounts receivable, less allowance of $191 in 2018 and $159 in 2017	41,634	34,487
Inventories, net	38,959	36,499
Other current assets	3,733	3,616
Total current assets	127,004	118,832
Long-term deferred tax assets, net	213	210
Long-term investments, net	2,548	2,525
Property, plant and equipment, net	40,973	41,356
Other assets	2,892	2,801
Total assets	173,630	165,724
Current liabilities:
Accounts payable	11,396	9,065
Accrued compensation and benefits	9,002	9,891
Accrued expenses	2,262	2,989
Income taxes payable	298	300
Deferred revenue	2,769	5,791
Sales allowances	384
Total current liabilities	26,111	28,036
Long-term deferred revenue	285	303
Contingent consideration obligations	584	678
Long-term income taxes payable	200	195
Other long-term liabilities	95	93
Total liabilities	27,275	29,305
Commitments and contingencies (Note 11)
Vicor Corporation stockholders' equity:
Additional paid-in capital	183,415	181,395
Retained earnings	101,218	93,605
Accumulated other comprehensive loss	(234)	(478)
Treasury stock, at cost	(138,927)	(138,927)
Total Vicor Corporation stockholders' equity	145,992	136,114
Noncontrolling interest	363	305
Total equity	146,355	136,419
Total liabilities and equity	173,630	165,724
Class B Common Stock [Member]
Vicor Corporation stockholders' equity:
Common Stock	118	118
Common Stock [Member]
Vicor Corporation stockholders' equity:
Common Stock	$ 402	$ 401

Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

Name:	us-gaap_AccountsPayableCurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount due from customers or clients, within one year of the balance sheet date (or the normal operating cycle, whichever is longer), for goods or services (including trade receivables) that have been delivered or sold in the normal course of business, reduced to the estimated net realizable fair value by an allowance established by the entity of the amount it deems uncertain of collection.