Condensed Consolidated Balance Sheets (Unaudited) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Current assets:
Cash and cash equivalents	$ 10,902	$ 16,242
Marketable investments	70,696	66,831
Accounts receivable, net	7,596	9,679
Inventories	10,030	9,006
Deferred tax asset	32	31
Other current assets and prepaid expenses	1,772	1,507
Total current assets	101,028	103,296
Property and equipment, net	1,329	1,362
Deferred tax asset, net of current portion	342	329
Intangibles, net	1,632	2,019
Goodwill	1,339	1,339
Other long-term assets	15	324
Total assets	105,685	108,669
Current liabilities:
Accounts payable	2,028	1,820
Accrued liabilities	7,473	9,328
Deferred revenue	8,561	7,494
Total current liabilities	18,062	18,642
Deferred revenue, net of current portion	4,578	4,340
Income tax liability	144	108
Other long-term liabilities	1,141	1,314
Total liabilities	23,925	24,404
Commitments and Contingencies (Note 10)
Stockholders’ equity:
Common stock, $0.001 par value; authorized: 50,000,000 shares; issued and outstanding: 14,311,168 and 13,931,833 shares at June 30, 2014 and December 31, 2013, respectively	14	14
Additional paid-in capital	102,649	98,820
Accumulated deficit	(20,971)	(14,620)
Accumulated other comprehensive income	68	51
Total stockholders’ equity	81,760	84,265
Total liabilities and stockholders’ equity	105,685	108,669
Convertible Preferred Stock [Member]
Stockholders’ equity:
Convertible preferred stock, $0.001 par value; authorized: 5,000,000 shares; none issued and outstanding	$ 0	$ 0