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Stockholders' Equity | 3 Months Ended
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Mar. 31, 2021
Equity [Abstract] |
Stockholders' Equity | 10. Stockholders’ Equity Preferred Stock As of December 31, 2020 and March 31, 2021, the Company had authorized 10,000,000 shares of undesignated preferred stock, par value $0.001, of which no shares were issued and outstanding. Common Stock As of December 31, 2020 and March 31, 2021, the Company had authorized 100,000,000 shares of Class A common stock, par value $0.001 per share, with one vote per share and 20,000,000 shares of Class B common stock, par value $0.001 per share, with ten votes per share. As of December 31, 2020, 22,413,004 and 2,496,125 shares of Class A common stock and Class B common stock, respectively, were issued and outstanding. As of March 31, 2021, 22,873,604 and 2,215,170 shares of Class A common stock and Class B common stock, respectively, were issued and outstanding. Shares of Class B common stock are convertible into shares of Class A common stock upon the stockholder’s voluntary written notice to the Company’s transfer agent or a transfer by the stockholder, subject to limited exceptions for transfers for estate planning purposes. Reserved Shares The Company had reserved shares of Class A common stock for issuance under stock-based award agreements as follows:
| As of December 31, |  | As of March 31,
| 2020 |  | 2021
Stock options issued and outstanding | 255,000 |  |  | 196,433 |
Nonvested restricted stock units issued and outstanding | 450,614 |  |  | 405,875 |
Stock-based awards available for grant under the 2017 Plan | 2,020,342 |  |  | 3,044,024 |
| 2,725,956 |  |  | 3,646,332 |

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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 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 Reference 2: 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 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -URI http://asc.fasb.org/topic&trid=2208762 + Details
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