Condensed Consolidated Balance Sheets - USD ($)	Mar. 31, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 42,284,000	$ 47,361,000
Short-term investments	29,906,000	29,899,000
Accounts receivable, net	27,216,000	30,174,000
Prepaid expenses	8,411,000	7,517,000
Other current assets	2,433,000	2,714,000
Total current assets	110,250,000	117,665,000
Non-current assets:
Property and equipment, net	7,655,000	8,000,000
Operating lease right-of-use assets	15,591,000	16,317,000
Capitalized software development	1,705,000	0
Goodwill	124,182,000	124,182,000
Intangible assets, net	2,292,000	2,917,000
Deferred income tax assets	47,486,000	48,983,000
Other non-current assets	1,641,000	1,808,000
Total non-current assets	200,552,000	202,207,000
Total assets	310,802,000	319,872,000
Current liabilities:
Accounts payable	4,003,000	3,615,000
Accrued compensation and benefits	10,403,000	11,680,000
Accrued taxes	1,419,000	1,529,000
Deferred revenue	25,265,000	25,944,000
Operating lease liabilities	5,236,000	5,437,000
Other current liabilities	3,629,000	2,978,000
Total current liabilities	49,955,000	51,183,000
Non-current liabilities:
Asset retirement obligations	6,109,000	6,061,000
Operating lease liabilities	10,972,000	11,575,000
Other non-current liabilities	986,000	959,000
Total non-current liabilities	18,067,000	18,595,000
Total liabilities	68,022,000	69,778,000
Commitments and contingencies (Note 12)
Stockholders' equity:
Preferred stock	0	0
Common stock	2,000	2,000
Additional paid-in capital	87,153,000	86,874,000
Accumulated other comprehensive loss	(1,821,000)	(1,601,000)
Retained earnings	157,446,000	164,819,000
Total stockholders’ equity	242,780,000	250,094,000
Total liabilities and stockholders' equity	$ 310,802,000	$ 319,872,000