CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS - USD ($)		12 Months Ended
		Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Income Statement [Abstract]
Revenues	[1]	$ 376,423,000	$ 367,013,000	$ 356,036,000
Cost of revenues	[1],[2],[3]	205,294,000	203,044,000	180,712,000
Selling and marketing	[2],[3]	68,453,000	66,937,000	70,220,000
Research and development	[2],[3]	36,987,000	39,123,000	38,706,000
General and administrative	[2],[3]	61,200,000	61,736,000	55,783,000
Amortization of intangible assets		27,096,000	25,038,000	27,219,000
Goodwill, impairment charges		46,300,000	0	0
Restructuring		5,810,000	0	0
Impairment of right-of-use and long-lived assets		156,000	0	4,671,000
Total expenses from operations		451,296,000	395,878,000	377,311,000
Loss from operations		(74,873,000)	(28,865,000)	(21,275,000)
Loss on extinguishment of debt	[1]	0	(9,629,000)	0
Interest expense, net	[1]	(915,000)	(7,801,000)	(35,805,000)
Other income (expense), net		9,785,000	(5,778,000)	14,554,000
Gain (loss) from foreign currency transactions		1,166,000	2,895,000	(4,490,000)
Loss before income taxes		(64,837,000)	(49,178,000)	(47,016,000)
Income tax provision		(1,724,000)	(859,000)	(902,000)
Net loss		(66,561,000)	(50,037,000)	(47,918,000)
Net loss available to common stockholders
Net loss		(66,561,000)	(50,037,000)	(47,918,000)
Convertible redeemable preferred stock dividends	[1]	(15,513,000)	(12,623,000)	0
Total net loss available to common stockholders		(82,074,000)	(62,660,000)	(47,918,000)
Total net loss available to common stockholders		$ (82,074,000)	$ (62,660,000)	$ (47,918,000)
Net loss per common share:
Basic (in shares)		$ (0.89)	$ (0.78)	$ (0.67)
Diluted (in shares)		$ (0.89)	$ (0.78)	$ (0.67)
Weighted-average number of shares used in per share calculation - Common Stock:
Basic (in shares)		92,683,564	80,802,053	71,181,496
Diluted (in shares)		92,683,564	80,802,053	71,181,496
Comprehensive loss:
Net loss		$ (66,561,000)	$ (50,037,000)	$ (47,918,000)
Other comprehensive (loss) income:
Foreign currency cumulative translation adjustment		(3,842,000)	(5,068,000)	5,303,000
Total comprehensive loss		$ (70,403,000)	$ (55,105,000)	$ (42,615,000)

[1] Transactions with related parties are included in the line items above as follows (refer to Footnote 14, Related Party Transactions, for further information): Years Ended December 31,202220212020Revenues$14,934 $16,285 $13,314 Cost of revenues26,971 34,534 10,094 Interest expense, net— (4,692)(24,480)Loss on extinguishment of debt— (9,608)— Convertible redeemable preferred stock dividends(15,513)(12,623)— 

[2] Excludes amortization of intangible assets, which is presented separately in the Consolidated Statements of Operations and Comprehensive Loss.

[3] Stock-based compensation expense is included in the line items above as follows: Years Ended December 31,202220212020Cost of revenues$1,144 $1,603 $1,288 Selling and marketing1,021 1,791 2,226 Research and development827 1,079 886 General and administrative5,186 9,375 5,673 Total stock-based compensation expense$8,178 $13,848 $10,073