Consolidated Balance Sheets (Current Period Unaudited) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Current assets:
Cash and cash equivalents	$ 119,985	$ 105,734
Accounts receivable, net of allowance of $9,556 in 2016 and $13,012 in 2015	8,560	7,917
Prepaid expenses	6,830	10,746
Income tax receivable	981	0
Deferred income taxes	4,806	6,714
Total current assets	141,162	131,111
Property and equipment, net	108,005	109,281
Investments	17,465	15,915
Goodwill	38,634	38,634
Other assets, net	9,132	8,955
Total assets	314,398	303,896
Current liabilities:
Accounts payable	7,171	6,264
Accrued liabilities	17,937	14,808
Deferred revenue	25,898	29,727
Total current liabilities	51,006	50,799
Deferred income taxes	16,011	15,944
Total liabilities	$ 67,017	$ 66,743
Commitments and contingencies
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; 16,055 issued and outstanding in 2016; 15,989 issued and outstanding in 2015	161	160
Additional paid-in capital	173,587	173,700
Retained earnings	73,633	63,293
Total stockholders’ equity	247,381	237,153
Total liabilities and stockholders’ equity	$ 314,398	$ 303,896