Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Accumulated Comprehensive Deficit
BALANCE, at beginning of period (in shares) at Dec. 31, 2020		41,233,000
BALANCE, at beginning of period at Dec. 31, 2020	$ 58,716	$ 41	$ 279,905	$ (221,230)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Non-cash compensation recognized on stock options and ESPP	83		83
Restricted stock grants, net of cancellations (in shares)		991,000
Restricted stock grants, net of cancellations	4,765	$ 1	4,764
Cancellation of shares for payment of withholding tax (in shares)		(385,000)
Cancellation of shares for payment of withholding tax	(2,220)		(2,220)
Employee stock purchase plan (in shares)		10,000
Employee stock purchase plan	37		37
Exercise of stock options (in shares)		21,000
Exercise of stock options	65		65
Common shares issued in stock offering, net offering costs (in shares)		9,521,000
Common shares in stock offering, net of offering costs	59,711	$ 10	59,701
Common shares issued in connection with Avast acquisition, net (in shares)		1,460,000
Common shares issued in connection with Avast Family Safety Mobile acquisition, net	8,381	$ 1	8,380
Exercise of common stock warrants (in shares)		1,408,000
Exercise of common stock warrants	2,065	$ 1	2,064
Net loss	$ (31,043)			(31,043)
BALANCE, at end of period (in shares) at Dec. 31, 2021	54,259,390	54,259,000
BALANCE, at end of period at Dec. 31, 2021	$ 100,560	$ 54	352,779	(252,273)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Non-cash compensation recognized on stock options and ESPP	86		86
Restricted stock grants, net of cancellations (in shares)		1,187,000
Restricted stock grants, net of cancellations	4,862	$ 1	4,861
Cancellation of shares for payment of withholding tax (in shares)		(406,000)
Cancellation of shares for payment of withholding tax	(1,218)		(1,218)
Employee stock purchase plan (in shares)		17,000
Employee stock purchase plan	$ 40		40
Exercise of stock options (in shares)	9,000	9,000
Exercise of stock options	$ 19		19
Common shares issued in stock offering, net offering costs (in shares)		1,132,000
Common shares in stock offering, net of offering costs	1,309	$ 1	1,308
Net loss	$ (29,279)			(29,279)
BALANCE, at end of period (in shares) at Dec. 31, 2022	56,197,910	56,198,000
BALANCE, at end of period at Dec. 31, 2022	$ 76,379	$ 56	$ 357,875	$ (281,552)