Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents	$ 11,963	$ 11,730
Short-term investments	3,587	7,974
Accounts receivable, net of reserves of $157 and $167 as of June 30, 2017 and December 31, 2016, respectively	934	896
Prepaids and other	1,120	1,186
Total current assets	17,604	21,786
Property and equipment, net	46	60
Other assets	148	147
Total assets	17,798	21,993
Current liabilities:
Accounts payable	391	377
Accrued expenses	1,979	1,866
Unearned revenue	1,493	1,260
Deferred maintenance	1,074	893
Total current liabilities	4,937	4,396
Other non-current liabilities	779	734
Total liabilities	5,716	5,130
Stockholders’ equity:
Convertible preferred stock, $0.0001 par value; 1,000 shares authorized; none issued and outstanding
Common stock, $0.0001 par value; 11,200 shares authorized; 4,985 and 4,958 shares issued and outstanding as of June 30, 2017 and December 31, 2016, respectively
Additional paid-in capital	1,271,161	1,270,649
Accumulated other comprehensive loss	(1,300)	(967)
Accumulated deficit	(1,257,779)	(1,252,819)
Total stockholders' equity	12,082	16,863
Total liabilities and stockholders' equity	$ 17,798	$ 21,993