Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 26,052	$ 14,184
Marketable investments	9,523	21,728
Accounts receivable, net of allowance for doubtful accounts of $1,257 and $9, respectively	19,637	20,777
Inventories	28,014	28,782
Other current assets and prepaid expenses	3,972	2,903
Total current assets	87,198	88,374
Property and equipment, net	2,672	2,096
Deferred tax assets	457	19,055
Goodwill	1,339	1,339
Other long-term assets	5,971	374
Total assets	97,637	111,238
Current liabilities:
Accounts payable	11,279	7,002
Accrued liabilities	23,300	26,848
Extended warranty liabilities	3,159
Deferred revenue	9,882	9,461
Total current liabilities	47,620	43,311
Deferred revenue, net of current portion	2,684	2,195
Income tax liability	394	379
Other long-term liabilities	553	460
Total liabilities	51,251	46,345
Commitments and contingencies (Note 11)
Stockholders’ equity:
Common stock, $0.001 par value: Authorized: 50,000,000 shares; Issued and outstanding: 13,968,852 and13,477,973 shares at December 31, 2018 and 2017, respectively	14	13
Additional paid-in capital	70,451	62,025
Retained earnings (accumulated deficit)	(24,010)	2,947
Accumulated other comprehensive loss	(69)	(92)
Total stockholders’ equity	46,386	64,893
Total liabilities and stockholders’ equity	$ 97,637	$ 111,238