Consolidated Balance Sheets (Current Period Unaudited) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents (Note 2)	$ 166,259	$ 146,351
Accounts receivable, net of allowance of $6,572 in 2017 and $8,077 in 2016	6,389	6,949
Prepaid expenses	6,651	5,327
Income tax receivable	757	0
Total current assets	180,056	158,627
Property and equipment, net	92,169	97,687
Assets held for sale	0	2,100
Investments	14,716	14,611
Goodwill	33,899	33,899
Other assets, net	9,061	8,696
Total assets	329,901	315,620
Current liabilities:
Accounts payable	5,041	6,853
Accrued liabilities	13,613	14,124
Deferred revenue	21,994	20,639
Income tax payable	0	559
Total current liabilities	40,648	42,175
Deferred income taxes	9,231	8,775
Total liabilities	49,879	50,950
Commitments and contingencies (Note 11)
Stockholders’ equity:
Preferred stock, $.01 par value; Authorized shares - 10,000; no shares issued or outstanding	0	0
Common stock, $.01 par value; Authorized shares - 100,000; 16,249 issued and outstanding in 2017; 16,109 issued and outstanding in 2016	162	161
Additional paid-in capital	179,708	177,061
Retained earnings	100,152	87,448
Total stockholders’ equity	280,022	264,670
Total liabilities and stockholders’ equity	$ 329,901	$ 315,620