Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 49,235	$ 47,361
Short-term investments	29,994	29,899
Accounts receivable, net	29,671	30,174
Prepaid expenses	8,056	7,517
Other current assets	1,645	2,714
Total current assets	118,601	117,665
Non-current assets:
Property and equipment, net	6,933	8,000
Operating lease right-of-use assets	14,342	16,317
Capitalized software development, net	7,784	0
Goodwill	124,182	124,182
Intangible assets, net	1,042	2,917
Deferred income tax assets, net	48,308	48,983
Other non-current assets	1,081	1,808
Total non-current assets	203,672	202,207
Total assets	322,273	319,872
Current liabilities:
Accounts payable	5,112	3,615
Accrued compensation and benefits	13,845	11,680
Deferred revenue	27,174	25,944
Operating lease liabilities	5,220	5,437
Other current liabilities	4,565	4,507
Total current liabilities	55,916	51,183
Non-current liabilities:
Asset retirement obligations	6,123	6,061
Operating lease liabilities	9,766	11,575
Other non-current liabilities	2,446	959
Total non-current liabilities	18,335	18,595
Total liabilities	74,251	69,778
Commitments and contingencies (Note 12)
Stockholders' equity:
Preferred stock	0	0
Common stock	2	2
Additional paid-in capital	90,297	86,874
Accumulated other comprehensive loss	(1,656)	(1,601)
Retained earnings	159,379	164,819
Total stockholders’ equity	248,022	250,094
Total liabilities and stockholders' equity	$ 322,273	$ 319,872