Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Current assets:
Cash and cash equivalents	$ 13,775	$ 10,868
Marketable investments	40,299	37,539
Accounts receivable, net of allowance for doubtful accounts of $21 and $4, respectively	16,547	11,669
Inventories	14,977	12,078
Other current assets and prepaid expenses	2,251	1,675
Total current assets	87,849	73,829
Property and equipment, net	1,907	1,473
Deferred tax assets	377	350
Intangibles, net	2	143
Goodwill	1,339	1,339
Other long-term assets	380	384
Total assets	91,854	77,518
Current liabilities:
Accounts payable	2,598	1,959
Accrued liabilities	17,397	13,834
Deferred revenue	8,394	8,638
Total current liabilities	28,389	24,431
Deferred revenue, net of current portion	1,705	2,287
Income tax liability	168	182
Other long-term liabilities	582	584
Total liabilities	30,844	27,484
Commitments and contingencies (Note 10)
Stockholders’ equity:
Convertible preferred stock, $0.001 par value; Authorized: 5,000,000 shares; Issued and outstanding: none
Common stock, $0.001 par value; Authorized: 50,000,000 shares; Issued and outstanding: 13,773,389 and 12,980,807 shares at December 31, 2016 and 2015, respectively	14	13
Additional paid-in capital	88,114	79,782
Accumulated deficit	(27,046)	(29,672)
Accumulated other comprehensive loss	(72)	(89)
Total stockholders’ equity	61,010	50,034
Total liabilities and stockholders’ equity	$ 91,854	$ 77,518