CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands		Dec. 31, 2016	Dec. 31, 2015
Current assets:
Cash and cash equivalents		$ 16,890	$ 27,598
Short-term investments		36,519	38,136
Accounts receivable, less allowance of $19 and $6 at December 31, 2016 and 2015, respectively		9,567	10,019
Prepaid expenses and other current assets		1,211	1,474
Total current assets		64,187	77,227
Property and equipment, net		1,706	1,989
Intangible assets, net		266	1,294
Other assets		1,070	982
Total assets		67,229	81,492
Current liabilities:
Accounts payable		1,085	267
Accrued compensation		2,974	3,280
Other accrued liabilities		2,496	3,623
Short-term deferred revenue		2,759	2,184
Total current liabilities		9,314	9,354
Long-term deferred revenue		106	102
Other long-term liabilities		501	690
Total liabilities		9,921	10,146
Commitments and contingencies (Note 5)
Stockholders' equity:
Common stock; par value $0.0001, 50,000,000 shares authorized; 19,030,024 issued and 18,548,180 outstanding at December 31, 2016; 18,717,439 issued and 18,286,961 outstanding at December 31, 2015		2	2
Additional paid-in capital		267,400	265,327
Treasury stock, at cost (481,844 shares at December 31, 2016 and 430,478 shares at December 31, 2015)		(5,295)	(5,167)
Accumulated other comprehensive loss		(2,329)	(2,302)
Accumulated deficit		(202,470)	(186,514)
Total stockholders' equity	[1]	57,308	71,346
Total liabilities and stockholders' equity		$ 67,229	$ 81,492

[1] Prior periods adjusted to reflect the impact of the one-for-three reverse stock split that became effective on January 20, 2017, as discussed in Note 1.