Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Current assets
Cash and cash equivalents	$ 6,734	$ 7,897
Marketable securities	20,633	12,971
Trade accounts receivable, net of allowance for doubtful accounts of $151 and $151, respectively	4,601	4,364
Other current assets	1,202	906
Total current assets	33,170	26,138
Marketable securities, long term	19,643	25,597
Fixed assets, net	5,894	6,234
Deferred tax asset	44	54
Other long-term assets	69	17
Total long-term assets	25,650	31,902
Total assets	58,820	58,040
Current liabilities
Accounts payable	2,306	2,756
Accrued liabilities	745	436
Income tax payable	230	124
Total current liabilities	3,281	3,316
Other long-term liabilities		2
Deferred tax liability	243	243
Total liabilities	3,524	3,561
Commitments and contingencies (Note 8)
Stockholders’ equity
Common stock, $0.0001 par value per share, 200,000 shares authorized, 17,681 and 17,676 shares issued and outstanding at March 31, 2017 and December 31, 2016 respectively	2	2
Preferred stock, $0.0001 par value per share, 1,000 shares authorized, no shares issued or outstanding at March 31, 2017 and December 31, 2016
Additional paid-in capital	110,301	109,734
Accumulated other comprehensive loss	(85)	(103)
Accumulated deficit	(54,922)	(55,154)
Total stockholders’ equity	55,296	54,479
Total liabilities and stockholders’ equity	$ 58,820	$ 58,040