Consolidated Balance Sheets (Current Period Unaudited) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents (Note 2)	$ 157,128	$ 146,351
Accounts receivable, net of allowance of $6,608 in 2017 and $8,077 in 2016	6,201	6,949
Prepaid expenses	7,241	5,327
Income tax receivable	3,120	0
Total current assets	173,690	158,627
Property and equipment, net	93,685	97,687
Assets held for sale	0	2,100
Investments	14,672	14,611
Goodwill	33,899	33,899
Other assets, net	8,949	8,696
Total assets	324,895	315,620
Current liabilities:
Accounts payable	6,411	6,853
Accrued liabilities	12,492	14,124
Deferred revenue	20,802	20,639
Income tax payable	0	559
Total current liabilities	39,705	42,175
Deferred income taxes	10,848	8,775
Total liabilities	50,553	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; 16,248 issued and outstanding in 2017; 16,109 issued and outstanding in 2016	162	161
Additional paid-in capital	178,394	177,061
Retained earnings	95,786	87,448
Total stockholders’ equity	274,342	264,670
Total liabilities and stockholders’ equity	$ 324,895	$ 315,620