Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Cash flows provided by operating activities:
Net income	$ 742	$ 345
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and accretion	2,359	2,713
Deferred income tax expense	517	475
Stock-based compensation	528	1,234
Provision for doubtful accounts, service credits and other	374	628
Adjustment of non-cash transaction taxes	0	(53)
Changes in assets and liabilities:
Accounts receivable	(4,791)	(4,106)
Prepaid expenses, inventory, and other assets	(15,515)	(1,215)
Accounts payable, accrued liabilities and other	15,206	(2,182)
Deferred revenue	1,803	3,106
Net cash provided by operating activities	1,223	945
Cash flows used in investing activities:
Purchase of property and equipment	(1,287)	(1,164)
Purchase of short-term investments	(14,824)	0
Net cash used in investing activities	(16,111)	(1,164)
Cash flows used in financing activities:
Cash distributions to stockholders	(2,647)	(2,740)
Purchase of common stock (including commissions)	(1,810)	(1,927)
Purchase of common stock for tax withholding on vested equity awards	(1,011)	(892)
Net cash used in financing activities	(5,468)	(5,559)
Effect of exchange rate on cash	(60)	(256)
Net decrease in cash and cash equivalents	(20,416)	(6,034)
Cash and cash equivalents, beginning of period	83,343	103,179
Cash and cash equivalents, end of period	62,927	97,145
Supplemental disclosure:
Income taxes paid	$ 80	$ 50