Consolidated Balance Sheets - USD ($)	Dec. 31, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents	$ 5,571,000	$ 12,100,000
Marketable securities	2,689,000	5,030,000
Receivables, net of allowance for doubtful accounts of $472 and $187, as of December 31, 2017 and 2016 respectively	7,794,000	7,461,000
Inventories	14,415,000	11,377,000
Distributor channel inventories	1,555,000	1,530,000
Prepaid expenses and other assets	1,862,000	2,642,000
Total current assets	33,886,000	40,140,000
Long-term marketable securities	10,349,000	21,365,000
Long-term inventories, net	8,708,000	1,664,000
Property and equipment, net	1,549,000	1,513,000
Intangible assets, net	6,543,000	5,677,000
Goodwill	0	12,724,000
Deferred income taxes	6,531,000	4,654,000
Other assets	311,000	387,000
Total assets	67,877,000	88,124,000
Current liabilities:
Accounts payable	4,122,000	3,545,000
Accrued liabilities	1,843,000	1,894,000
Deferred product revenue	4,635,000	3,882,000
Total current liabilities	10,600,000	9,321,000
Deferred rent	103,000	103,000
Other long-term liabilities	607,000	1,251,000
Total liabilities	11,310,000	10,675,000
Shareholders’ equity:
Common stock, par value $0.001, 50,000,000 shares authorized, 8,319,022 and 8,812,644 shares issued and outstanding as of December 31, 2017 and 2016 respectively	8,000	9,000
Additional paid-in capital	47,464,000	46,669,000
Accumulated other comprehensive loss	(65,000)	(205,000)
Retained earnings	9,160,000	30,976,000
Total shareholders’ equity	56,567,000	77,449,000
Total liabilities and shareholders’ equity	$ 67,877,000	$ 88,124,000

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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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.