CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Cash flows from operating activities:
Net loss	$ (5,297)	$ (12,081)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
Depreciation and amortization	2,773	3,345
Stock-based compensation expense	9,425	6,111
Amortization of acquired intangible assets	1,734	1,698
Amortization of costs capitalized to obtain revenue contracts	755	327
Deferred taxes	17	84
Other	20	133
Changes in operating assets and liabilities:
Accounts receivable	3,910	3,989
Prepaid expenses and other current assets	(3,208)	1,235
Operating lease right-of-use assets	1,238	740
Other non-current assets	1,002	362
Accounts payable	(3,633)	(1,723)
Accrued compensation and related benefits	1,362	(1,028)
Accrued and other liabilities	2,147	116
Deferred revenues	(4,789)	(3,514)
Billings in excess of recognized revenues	480	848
Operating lease liabilities	(1,316)	(837)
Net cash provided by (used in) operating activities	6,620	(195)
Cash flows from investing activities:
Proceeds from maturities and sales of short-term investments	112,500	109,000
Purchases of short-term investments	(35,920)	(45,992)
Purchases of property and equipment	(4,454)	(1,121)
Prepayment for the purchase of property and equipment	(133)
Net cash provided by investing activities	71,993	61,887
Cash flows from financing activities:
Proceeds from exercise of stock options	788	793
Proceeds from employee stock purchase plan	1,502	921
Payments for taxes related to net share settlement of equity awards	(4,189)	(2,350)
Repurchases of common stock	(22,471)	(4,523)
Net cash used in financing activities	(24,370)	(5,159)
Effect of exchange rate changes on cash and cash equivalents	(584)	(128)
Net change in cash, cash equivalents, and restricted cash	53,659	56,405
Cash, cash equivalents, and restricted cash at beginning of period	27,684	33,815
Cash, cash equivalents, and restricted cash at end of period	81,343	90,220
Reconciliation of cash, cash equivalents, and restricted cash to the balance sheets:
Cash and cash equivalents	81,343	87,201
Restricted cash		3,019
Total cash, cash equivalents and restricted cash	81,343	90,220
Supplemental disclosure of cash flow information:
Cash paid during the period for taxes	1,690	1,275
Cash paid for amounts included in the measurement of operating lease liabilities	795	1,076
Supplemental disclosure of noncash information:
Property and equipment received and accrued in accounts payable and accrued and other liabilities	2,466	530
Advances for purchase of fixed assets transferred from prepaid assets to property and equipment	333	963
Operating lease liabilities arising from obtaining right-of-use assets	$ 1,137
Release of restricted cash reducing goodwill due to the acquisition purchase price adjustment		$ 469