CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 13,526	$ 10,087
Short-term investments	16,441	16,327
Accounts receivable	6,975	9,398
Prepaid expenses and other current assets	670	728
Total current assets	37,612	36,540
Property and equipment, net	1,115	533
Intangible assets	0	250
Right of use assets, net	61	68
Other assets	478	649
Total assets	39,266	38,040
Current liabilities:
Accounts payable	366	277
Accrued compensation	1,735	1,610
Other accrued liabilities	879	940
Short-term lease liability	58	61
Short-term deferred revenue	881	1,193
Total current liabilities	3,919	4,081
Other long-term liabilities	911	792
Total liabilities	4,830	4,873
Commitments and contingencies (Note 3)
Stockholders' equity:
Common stock; par value $0.0001, 50,000 shares authorized; 19,973 issued and 19,490 outstanding at December 31, 2020 and 19,537 issued and 19,054 outstanding at December 31, 2019	2	2
Additional paid-in capital	250,954	250,092
Treasury stock, at cost (483 shares at December 31, 2020 and 2019)	(5,297)	(5,297)
Accumulated other comprehensive loss	(2,419)	(2,380)
Accumulated deficit	(208,804)	(209,250)
Total stockholders' equity	34,436	33,167
Total liabilities and stockholders' equity	$ 39,266	$ 38,040