Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Operating activities:
Net income (loss)	$ 2,384	$ (1,255)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation, amortization and accretion	6,553	6,999
Deferred income tax expense	15	(569)
Stock-based compensation	4,160	2,521
Provision for doubtful accounts, service credits and other	914	652
Changes in assets and liabilities:
Accounts receivable	(1,019)	252
Prepaid expenses, inventory, and other assets	3,701	2,131
Accounts payable, accrued liabilities and other liabilities	1,566	(1,366)
Deferred revenue	2,680	1,383
Net cash provided by operating activities	20,954	10,748
Investing activities:
Purchase of property and equipment	(2,824)	(4,162)
Capitalized software development	(8,206)	0
Purchase of short-term investments	(44,870)	(44,499)
Maturity of short-term investments	45,000	19,000
Net cash used in investing activities	(10,900)	(29,661)
Financing activities:
Cash distributions to stockholders	(7,388)	(7,440)
Purchase of common stock (including commissions)	0	(6,575)
Proceeds from issuance of common stock under the Employee Stock Purchase Plan	166	119
Purchase of common stock for tax withholding on vested equity awards	(903)	(1,017)
Net cash used in financing activities	(8,125)	(14,913)
Effect of exchange rate on cash	(55)	(198)
Net increase (decrease) in cash and cash equivalents	1,874	(34,024)
Cash and cash equivalents, beginning of period	47,361	83,343
Cash and cash equivalents, end of period	49,235	49,319
Supplemental disclosure:
Income taxes paid	$ 148	$ 927