Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Cash flows provided by operating activities:
Net income	$ 854	$ 3,444
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and accretion	3,223	3,323
Deferred income tax expense	279	2,327
Stock based compensation	955	637
Provision for doubtful accounts, service credits and other	223	238
Adjustment of non-cash transaction taxes	(122)	(81)
Changes in assets and liabilities:
Accounts receivable	(636)	1,322
Prepaid expenses and other assets	(146)	595
Accounts payable, accrued liabilities and other	(2,473)	(2,653)
Deferred revenue	1,515	367
Net cash provided by operating activities	3,672	9,519
Cash flows used in investing activities:
Purchase of property and equipment, net of proceeds from disposals of property and equipment	(2,851)	(1,445)
Net cash used in investing activities	(2,851)	(1,445)
Cash flows used in financing activities:
Cash distributions to stockholders	(7,694)	(2,580)
Purchase of common stock (including commissions), net of proceeds from issuance of common stock	4	(4,905)
Net cash used in financing activities	(7,690)	(7,485)
Net decrease in cash and cash equivalents	(6,869)	589
Cash and cash equivalents, beginning of period	125,816	111,332
Cash and cash equivalents, end of period	118,947	111,921
Supplemental disclosure:
Income taxes paid	$ 180	$ 352