Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Current assets:
Cash and cash equivalents	$ 25,013	$ 14,380
Short-term investments	39,918	42,981
Accounts and other receivables (net of allowances for doubtful accounts of: $15 and $28, respectively)	1,213	3,021
Deferred income taxes	0	9,377
Prepaid expenses and other current assets	2,790	845
Total current assets	68,934	70,604
Property and equipment, net	4,589	1,207
Deferred income tax assets	24,633	25,419
Prepaid income taxes	6,995	0
Intangibles and other assets, net	264	291
Total assets	105,415	97,521
Current liabilities:
Accounts payable	650	669
Accrued compensation	4,840	1,906
Other current liabilities	2,999	2,225
Deferred revenue	6,696	7,779
Total current liabilities	15,185	12,579
Long-term deferred revenue	2,516	7,827
Other long-term liabilities	1,099	512
Total liabilities	$ 18,800	$ 20,918
Commitments and contingencies
Stockholders’ equity:
Common stock and additional paid-in capital – $0.001 par value; 100,000,000 shares authorized; 34,845,310 and 34,225,778 shares issued, respectively; 28,329,416 and 27,715,387 shares outstanding, respectively	$ 212,115	$ 204,876
Accumulated other comprehensive income	86	102
Accumulated deficit	(79,948)	(82,806)
Treasury stock at cost: 6,515,894 and 6,510,391 shares, respectively	(45,638)	(45,569)
Total stockholders’ equity	86,615	76,603
Total liabilities and stockholders’ equity	$ 105,415	$ 97,521