Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 40,886	$ 47,361
Short-term investments	29,974	29,899
Accounts receivable, net	29,595	30,174
Prepaid expenses	7,921	7,517
Other current assets	2,997	2,714
Total current assets	111,373	117,665
Non-current assets:
Property and equipment, net	7,169	8,000
Operating lease right-of-use assets	14,795	16,317
Capitalized software development	5,300	0
Goodwill	124,182	124,182
Intangible assets, net	1,667	2,917
Deferred income tax assets, net	48,022	48,983
Other non-current assets	1,187	1,808
Total non-current assets	202,322	202,207
Total assets	313,695	319,872
Current liabilities:
Accounts payable	5,717	3,615
Accrued compensation and benefits	10,576	11,680
Accrued taxes	1,487	1,529
Deferred revenue	24,688	25,944
Operating lease liabilities	5,267	5,437
Other current liabilities	3,165	2,978
Total current liabilities	50,900	51,183
Non-current liabilities:
Asset retirement obligations	6,146	6,061
Operating lease liabilities	10,162	11,575
Other non-current liabilities	806	959
Total non-current liabilities	17,114	18,595
Total liabilities	68,014	69,778
Commitments and contingencies (Note 12)
Stockholders' equity:
Preferred stock	0	0
Common stock	2	2
Additional paid-in capital	88,681	86,874
Accumulated other comprehensive loss	(1,718)	(1,601)
Retained earnings	158,716	164,819
Total stockholders’ equity	245,681	250,094
Total liabilities and stockholders' equity	$ 313,695	$ 319,872