Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents	$ 41,974	$ 40,651
Short-term investments	29,630	48,415
Accounts and notes receivable, net of allowance of $765 and $443 as of March 31, 2017 and December 31, 2016, respectively	44,328	39,466
Inventory	48,699	34,841
Prepaid expenses and other current assets	15,707	13,858
Total current assets	180,338	177,231
Property and equipment, net of accumulated depreciation of $33,794 and $37,799 as of March 31, 2017 and December 31, 2016, respectively	26,399	24,004
Deferred income tax assets, net	20,055	19,515
Intangible assets, net	20,256	15,218
Goodwill	13,001	10,442
Long-term investments	0	234
Long-term accounts and notes receivable, net of current portion	24,688	17,602
Other assets	14,781	13,917
Total assets	299,518	278,163
Current liabilities:
Accounts payable	15,632	10,736
Accrued liabilities	20,330	18,248
Current portion of deferred revenue	49,909	45,137
Customer deposits	2,445	2,148
Current portion of business acquisition contingent consideration	1,705	1,690
Other current liabilities	467	80
Total current liabilities	90,488	78,039
Deferred revenue, net of current portion	41,644	40,054
Liability for unrecognized tax benefits	2,030	1,896
Long-term deferred compensation	3,407	3,362
Business acquisition contingent consideration, net of current portion	2,664	1,635
Other long-term liabilities	1,895	2,289
Total liabilities	142,128	127,275
Commitments and contingencies (Note 11)
Stockholders’ equity:
Preferred stock, $0.00001 par value; 25,000,000 shares authorized; no shares issued and outstanding as of March 31, 2017 and December 31, 2016	0	0
Common stock, $0.00001 par value; 200,000,000 shares authorized; 52,593,417 and 52,325,251 shares issued and outstanding as of March 31, 2017 and December 31, 2016, respectively	1	1
Additional paid-in capital	189,710	187,656
Treasury stock at cost, 20,220,227 shares as of March 31, 2017 and December 31, 2016	(155,947)	(155,947)
Retained earnings	122,558	118,275
Accumulated other comprehensive income	1,068	903
Total stockholders’ equity	157,390	150,888
Total liabilities and stockholders’ equity	$ 299,518	$ 278,163

The aggregate of amounts due from customers or clients, within one year of the balance sheet date (or one operating cycle, if longer), for goods or services that have been delivered or sold in the normal course of business and an amount representing an agreement for an unconditional promise by the maker to pay the entity (holder) a definite sum of money at a future date within one year of the balance sheet, reduced to their estimated net realizable fair value by an allowance established by the entity of the amount it deems uncertain of collection and net of any write-downs taken for collection uncertainty on the part of the holder, respectively.

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- Definition

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).