Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 53,920	$ 44,230
Accounts receivable, less allowance of $226 in 2018 and $159 in 2017	45,056	34,487
Inventories, net	41,753	36,499
Other current assets	4,102	3,616
Total current assets	144,831	118,832
Long-term deferred tax assets, net	185	210
Long-term investments, net	2,581	2,525
Property, plant and equipment, net	40,433	41,356
Other assets	2,813	2,801
Total assets	190,843	165,724
Current liabilities:
Accounts payable	11,219	9,065
Accrued compensation and benefits	11,049	9,891
Accrued expenses	2,535	2,989
Sales allowances	550
Accrued severance charge	350
Income taxes payable	526	300
Deferred revenue	4,610	5,791
Total current liabilities	30,839	28,036
Long-term deferred revenue	267	303
Contingent consideration obligations	506	678
Long-term income taxes payable	195	195
Other long-term liabilities	98	93
Total liabilities	31,905	29,305
Commitments and contingencies (Note 12)
Vicor Corporation stockholders' equity:
Additional paid-in capital	188,276	181,395
Retained earnings	109,078	93,605
Accumulated other comprehensive loss	(401)	(478)
Treasury stock, at cost	(138,927)	(138,927)
Total Vicor Corporation stockholders' equity	158,543	136,114
Noncontrolling interest	395	305
Total equity	158,938	136,419
Total liabilities and equity	190,843	165,724
Class B Common Stock [Member]
Vicor Corporation stockholders' equity:
Common Stock	118	118
Common Stock [Member]
Vicor Corporation stockholders' equity:
Common Stock	$ 399	$ 401