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Stockholders' Equity | 6 Months Ended
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Jun. 30, 2021
Equity [Abstract] |
Stockholders' Equity | Stockholders’ Equity Preferred Stock As of June 30, 2021 and December 31, 2020, the Company had 10,000,000 shares of preferred stock, par value $0.0001 authorized and no shares issued and outstanding. Common Stock As of June 30, 2021 and December 31, 2020, the Company had authorized 200,000,000 shares of common stock, par value $0.0001. As of June 30, 2021 and December 31, 2020, the Company had 88,096,694 shares and 87,651,352 shares issued and outstanding, respectively. The holders of shares of the Company’s common stock are entitled to one vote per share on all matters to be voted upon by the Company’s stockholders and there are no cumulative rights. Subject to preferences that may be applicable to any outstanding preferred stock, the holders of shares of the Company’s common stock are entitled to receive ratably any dividends that may be declared from time to time by the Board out of funds legally available for that purpose. In the event of the Company’s liquidation, dissolution or winding up, the holders of shares of the Company’s common stock are entitled to share ratably in all assets remaining after payment of liabilities, subject to prior distribution rights of preferred stock then outstanding. The Company’s common stock has no preemptive or conversion rights or other subscription rights. There are no redemption or sinking fund provisions applicable to the Company’s common stock. The outstanding shares of the Company’s common stock are fully paid and non-assessable. Common Stock Warrants As of June 30, 2021, no warrants were outstanding. As of December 31, 2020, warrants to purchase 413,320 shares of common stock at a price of $3.00 per share were outstanding. The warrants expired unexercised as follows: 163,174 warrants expired on March 27, 2021, 132,884 expired on April 28, 2021, and 117,262 expired on May 3, 2021. The warrants were classified as a liability which was remeasured each period at fair value. See Note 12, Fair Value Measurements for more information on the fair value of the common stock warrant liability. Accumulated Other Comprehensive Income (Loss) The following table summarizes the changes in each component of accumulated other comprehensive income (loss), net of tax, for 2021:
|  | Unrealized gains (losses) on short-term investments |  | Total
Balance at December 31, 2020 |  | $ | 83 |  |  | $ | 83 |
Other comprehensive loss before reclassifications |  | (51) |  |  | (51) |
Net current period other comprehensive loss |  | (51) |  |  | (51) |
Balance at March 31, 2021 |  | $ | 32 |  |  | $ | 32 |
Other comprehensive income (loss) before reclassifications |  | (27) |  |  | (27) |
Net current period other comprehensive income |  | (27) |  |  | (27) |
Balance at June 30, 2021 |  | $ | 5 |  |  | $ | 5 |
The following table summarizes the changes in each component of accumulated other comprehensive income (loss), net of tax, for 2020:
|  | Unrealized gains (losses) on short-term investments |  | Total
Balance at December 31, 2019 |  | $ | (27) |  |  | $ | (27) |
Other comprehensive income before reclassifications |  | 10 |  |  | 10 |
Net current period other comprehensive income |  | 10 |  |  | 10 |
Balance at March 31, 2020 |  | $ | (17) |  |  | $ | (17) |
Other comprehensive income (loss) before reclassifications |  | 352 |  |  | 352 |
Net losses (gains) reclassified from accumulated other comprehensive loss |  | 3 |  |  | 3 |
Net current period other comprehensive income |  | 355 |  |  | 355 |
Balance at June 30, 2020 |  | $ | 338 |  |  | $ | 338 |
The net loss reclassified from accumulated other comprehensive loss during the three months ended June 30, 2020 resulted from sales of available-for-sale securities prior to maturity. The gross realized gains and gross realized losses of these sales were $23 and $6, respectively, for the three and six months ended June 30, 2020. The basis on which the cost of the securities was determined was specific identification. Proceeds related to these sales were $9,404.

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- Definition The entire disclosure for shareholders' equity comprised of portions attributable to the parent entity and noncontrolling interest, including other comprehensive income. Includes, but is not limited to, balances of common stock, preferred stock, additional paid-in capital, other capital and retained earnings, accumulated balance for each classification of other comprehensive income and amount of comprehensive income. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 13 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123467817&loc=SL123496158-112644 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=123467817&loc=SL123496158-112644 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 14 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=123467817&loc=SL123496171-112644 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 14 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123467817&loc=SL123496171-112644 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=120397183&loc=d3e187085-122770 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 18 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=123467817&loc=SL123496189-112644 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 13 -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=123467817&loc=SL123496158-112644 Reference 8: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -URI http://asc.fasb.org/topic&trid=2208762 Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 18 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123467817&loc=SL123496189-112644 Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 13 -Subparagraph (h) -URI http://asc.fasb.org/extlink&oid=123467817&loc=SL123496158-112644 Reference 11: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123467817&loc=SL123496171-112644 Reference 12: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 18 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123467817&loc=SL123496189-112644 Reference 13: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 16 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123467817&loc=SL123496180-112644 Reference 14: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 13 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=123467817&loc=SL123496158-112644 Reference 15: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(e)(1)) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690 + Details
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