Condensed Consolidated Balance Sheets (Current Period Unaudited) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents	$ 14,784	$ 13,775
Marketable investments	35,692	40,299
Accounts receivable, net	19,604	16,547
Inventories	23,728	14,977
Other current assets and prepaid expenses	2,894	2,251
Total current assets	96,702	87,849
Property and equipment, net	1,842	1,907
Deferred tax asset	384	377
Intangibles, net		2
Goodwill	1,339	1,339
Other long-term assets	381	380
Total assets	100,648	91,854
Current liabilities:
Accounts payable	5,805	2,598
Accrued liabilities	22,203	17,397
Deferred revenue	8,801	8,394
Total current liabilities	36,809	28,389
Deferred revenue, net of current portion	1,950	1,705
Income tax liability	171	168
Other long-term liabilities	505	582
Total liabilities	39,435	30,844
Commitments and Contingencies (Note 11)
Stockholders’ equity:
Convertible preferred stock, $0.001 par value; authorized: 5,000,000 shares; none issued and outstanding
Common stock, $0.001 par value; authorized: 50,000,000 shares; issued and outstanding: 13,906,439 and 13,773,389 shares at September 30, 2017 and December 31, 2016, respectively	14	14
Additional paid-in capital	81,195	88,114
Accumulated deficit	(19,933)	(27,046)
Accumulated other comprehensive loss	(63)	(72)
Total stockholders’ equity	61,213	61,010
Total liabilities and stockholders’ equity	$ 100,648	$ 91,854