CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 25,182	$ 18,050
Short-term investments	24,467	31,183
Accounts receivable, less allowance of $13 and $9 at December 31, 2018 and 2017, respectively	12,292	11,951
Prepaid expenses and other current assets	999	802
Total current assets	62,940	61,986
Property and equipment, net	703	1,133
Intangible assets, net	250	250
Other assets	707	984
Total assets	64,600	64,353
Current liabilities:
Accounts payable	368	504
Accrued compensation	3,423	3,157
Other accrued liabilities	978	1,330
Accrued legal settlement	10,000	0
Short-term deferred revenue	1,135	2,006
Total current liabilities	15,904	6,997
Long-term deferred revenue	0	13
Other long-term liabilities	800	885
Total liabilities	16,704	7,895
Commitments and contingencies (Note 5)
Stockholders' equity:
Common stock; par value $0.0001, 50,000,000 shares authorized; 19,438,178 issued and 18,955,264 outstanding at December 31, 2018; 19,211,826 issued and 18,728,192 outstanding at December 31, 2017	2	2
Additional paid-in capital	268,794	267,857
Treasury stock, at cost (482,914 shares at December 31, 2018 and December 31, 2017)	(5,297)	(5,297)
Accumulated other comprehensive loss	(2,507)	(2,108)
Accumulated deficit	(213,096)	(203,996)
Total stockholders' equity	47,896	56,458
Total liabilities and stockholders' equity	$ 64,600	$ 64,353