Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents	$ 44,230	$ 56,170
Accounts receivable, less allowance of $159 in 2017 and $153 in 2016	34,487	25,216
Inventories, net	36,499	27,136
Other current assets	3,616	3,250
Total current assets	118,832	111,772
Long-term deferred tax assets	210	38
Long-term investments, net	2,525	2,508
Property, plant and equipment, net	41,356	37,574
Other assets	2,801	2,175
Total assets	165,724	154,067
Current liabilities:
Accounts payable	9,065	7,588
Accrued compensation and benefits	9,891	8,965
Accrued expenses	2,989	2,179
Income taxes payable	300	92
Deferred revenue	5,791	3,403
Total current liabilities	28,036	22,227
Long-term deferred revenue	303	374
Contingent consideration obligations	678	253
Long-term income taxes payable	195	196
Other long-term liabilities	93
Total liabilities	29,305	23,050
Commitments and contingencies (Note 15)
Vicor Corporation stockholders' equity:
Preferred Stock, $.01 par value, 1,000,000 shares authorized; no shares issued
Additional paid-in capital	181,395	176,344
Retained earnings	93,605	93,438
Accumulated other comprehensive loss	(478)	(561)
Treasury stock at cost: 11,671,486 shares in 2017 and 2016	(138,927)	(138,927)
Total Vicor Corporation stockholders' equity	136,114	130,809
Noncontrolling interest	305	208
Total equity	136,419	131,017
Total liabilities and equity	165,724	154,067
Class B Common Stock [Member]
Vicor Corporation stockholders' equity:
Common Stock	118	118
Total equity	118	118
Common Stock [Member]
Vicor Corporation stockholders' equity:
Common Stock	$ 401	$ 397

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).

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- 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.