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Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands | Total | Common Stock [Member] | Additional Paid-in Capital [Member] | Accumulated Comprehensive Deficit [Member]
--- | --- | --- | --- | ---
BALANCE at Dec. 31, 2019 | $ 48,684 | $ 38 | $ 274,041 | $ (225,395)
BALANCE, Shares at Dec. 31, 2019 |  | 38,475,000 |  |
Non-cash compensation recognized on stock options and ESPP | 30 |  | 30 |
Restricted stock grants, net of cancellations | 1,411 | $ 1 | 1,410 |
Restricted stock grants, net of cancellations, shares |  | 1,000,000 |  |
Cancellation of shares for payment of withholding tax | (868) |  | (868) |
Cancellation of shares for payment of withholding tax, shares |  | (176,000) |  |
Employee stock purchase plan | 5 |  | 5 |
Employee stock purchase plan, shares |  | 2,000 |  |
Exercise of common stock warrants | 4,196 | $ 2 | 4,194 |
Exercise of common stock warrants, shares |  | 2,047,000 |  |
Exercise of stock options | 16 |  | 16 |
Exercise of stock options, shares |  | 8,000 |  |
Net income (loss) | 3,424 |  |  | 3,424
BALANCE at Jun. 30, 2020 | 56,898 | $ 41 | 278,828 | (221,971)
BALANCE, Shares at Jun. 30, 2020 |  | 41,356,000 |  |
BALANCE at Mar. 31, 2020 | 52,853 | $ 40 | 276,163 | (223,350)
BALANCE, Shares at Mar. 31, 2020 |  | 40,383,000 |  |
Non-cash compensation recognized on stock options and ESPP | 17 |  | 17 |
Restricted stock grants, net of cancellations | 791 |  | 791 |
Cancellation of shares for payment of withholding tax | (296) |  | (296) |
Cancellation of shares for payment of withholding tax, shares |  | (66,000) |  |
Exercise of common stock warrants | 2,151 | $ 1 | 2,150 |
Exercise of common stock warrants, shares |  | 1,038,000 |  |
Exercise of stock options | 3 |  | 3 |
Exercise of stock options, shares |  | 1,000 |  |
Net income (loss) | 1,379 |  |  | 1,379
BALANCE at Jun. 30, 2020 | 56,898 | $ 41 | 278,828 | (221,971)
BALANCE, Shares at Jun. 30, 2020 |  | 41,356,000 |  |
BALANCE at Dec. 31, 2020 | $ 58,716 | $ 41 | 279,905 | (221,230)
BALANCE, Shares at Dec. 31, 2020 | 41,232,804 | 41,233,000 |  |
Non-cash compensation recognized on stock options and ESPP | $ 39 |  | 39 |
Restricted stock grants, net of cancellations | 2,255 | $ 1 | 2,254 |
Restricted stock grants, net of cancellations, shares |  | 1,070,000 |  |
Cancellation of shares for payment of withholding tax | (1,309) |  | (1,309) |
Cancellation of shares for payment of withholding tax, shares |  | (211,000) |  |
Employee stock purchase plan | 15 |  | 15 |
Employee stock purchase plan, shares |  | 4,000 |  |
Common shares issued in stock offering, net of offering costs | 59,711 | $ 10 | 59,701 |
Common shares issued in stock offering, net offering costs, shares |  | 9,521,000 |  |
Common shares issued in connection with Avast Family Safety Mobile acquisition, net | 8,381 | $ 1 | 8,380 |
Common shares issued in connection with Avast Family Safety Mobile acquisition, net, shares |  | 1,460,000 |  |
Exercise of common stock warrants | 40 | $ 1 | 39 |
Exercise of common stock warrants, shares |  | 484,000 |  |
Exercise of stock options | 53 |  | 53 |
Exercise of stock options, shares |  | 15,000 |  |
Net income (loss) | (8,428) |  |  | (8,428)
BALANCE at Jun. 30, 2021 | $ 119,473 | $ 54 | 349,077 | (229,658)
BALANCE, Shares at Jun. 30, 2021 | 53,575,888 | 53,576,000 |  |
BALANCE at Mar. 31, 2021 | $ 115,655 | $ 52 | 340,058 | (224,455)
BALANCE, Shares at Mar. 31, 2021 |  | 51,646,000 |  |
Non-cash compensation recognized on stock options and ESPP | 21 |  | 21 |
Restricted stock grants, net of cancellations | 1,258 |  | 1,258 |
Restricted stock grants, net of cancellations, shares |  | 100,000 |  |
Cancellation of shares for payment of withholding tax | (484) |  | (484) |
Cancellation of shares for payment of withholding tax, shares |  | (90,000) |  |
Costs associated with common stock offering | (188) |  | (188) |
Common shares issued in connection with Avast Family Safety Mobile acquisition, net | 8,381 | $ 1 | 8,380 |
Common shares issued in connection with Avast Family Safety Mobile acquisition, net, shares |  | 1,460,000 |  |
Exercise of common stock warrants |  | $ 1 | (1) |
Exercise of common stock warrants, shares |  | 451,000 |  |
Exercise of stock options | 33 |  | 33 |
Exercise of stock options, shares |  | 9,000 |  |
Net income (loss) | (5,203) |  |  | (5,203)
BALANCE at Jun. 30, 2021 | $ 119,473 | $ 54 | $ 349,077 | $ (229,658)
BALANCE, Shares at Jun. 30, 2021 | 53,575,888 | 53,576,000 |  |

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